So whenever Noxus finally invades Piltover, the following are the questions I have:
Would Urgot help defend Piltover just to spite Noxus?
What champions would help with the invasion, and what kind of interactions would they have with Urgot?
(Not related to Urgot) Would Demacia send help to Piltover to keep hextech out of the hands of Noxus?
Demacia is isolationist and fairly distant from Piltover, not to mention the fact that they'd probably regard Piltover's hextech as being similar to magic. I highly doubt they'd bestir themselves to defend a city-state so close to the Noxian Empire.
Concerning Urgot, I am fairly certain he wouldn't act to defend Piltover. However, he would certainly try to cause as much harm to Noxus as possible, regardless of collateral damage. He has no love for his former home.
Demacia is kind of far away, and I think Noxus controls several ports along the sea route between Noxus and Piltover that they could use as a base to disrupt sea trade between them. Apart from slipping in a few agents, I think the best Demacia could do is mount a diversionary attack on other Noxian outposts. I don't know what kind of navy Demacia has. Piltover is implied to be a naval power, but their forces would probably be focused on defending Piltover.
As it was already mentioned in this discussion: it would be difficult for Demacia to get to the Piltover without full fightinh with Noxus first. Also, Demacia and Piltover do not trade, cause in Demacia trade is prohibited, as seen in the Medarda Heirloom, Demacians are also likely to see hextech as magic (cause in the end it based on Backern's magic). So why would they defend nation that they have no interest of saving, nation which is using thing Demacians' hate, have no economic influence on Demacia and is too far away to just send troops there without any consequences.
People seems to forget that Demacia is not all-good nation. They are not good guys. They are just nation, just guys. They would not kindly save all they can, they would act only if it would heavily affect them. And Noxus' war with Piltover would not.
Why does Urgot care about Piltover? It seems to me he detests Piltover as much as he destests Noxus, with only a rare few of the notables of whom he actually bothers to acknowledge (
). Urgot seems to favor chaos, power, and revolution over the tightly formulated control Piltover has. This is why he appears to be basing his insurgency and launching point for his revenge on Noxus in Zaun, as the chaotic underbelly of Piltover is a breeding pool for rebellion.
I think if Urgot managed to destroy and usurp the chem-barons in Zaun, he might defend the city from a Noxus invasion - but only because he had conquered it. But I severely doubt he would care about Piltover up above.
Noxus won't invade Piltover any time soon, their defense is way too powerful.
i highly doubt demacia would even realy want to protect piltover, seeing hextech as magic, and the long distance, they probobly have very little reason to.
if anything, i would expect them to fortify thier own place as much as possible, in case noxus does prevail, and they would then go for them. and even with heztech, i would assume demacias anti-magic city would help with that-but not completely disable it. as it is different from normal magic. i think it would probobly weaken the heztech, but not completely disable it. that said, because heztech isn't "full" magic, even with alot of it, it might not be enough to wake up galio-or it might, i could be wrong(assuming noxus would not bring much magic of thier own, knowing full and well it will be disabled).
maybe could wake up 
if need be, but only if the situation is dire enough-considering her circumstances.
as for piltover, i would assume 
would probobly wait for a moment when noxus and piltover are weakened, to try and bring both sides to thier knees-to have his ideal of strength on both sides-rather than one, if given the oppertunity. 
could theoretically defend piltover, but i think it's more likely that she would try to cause as much chaos as possible. she already likes creating as much chaos as possible in piltover-but with a war going on, that'd be like a playground for her, she'd have the time of her life.
as for zaun, could be either way. i could see a bunch of internal conflict between people of both piltover and zaun, about what zaun should be doin in that situation. for many, piltover is the only hope they have of not being stuck in zaun thier whole life-particularly in the slums. while those in the higher ends of zaun, might not see a need to help out-unless they feel like noxus might go after then immidiately after piltover. wether noxus decides to go after zaun afterwards, depends on if they think they got enough left in them to continue-rather than retreat. if thier weaker, i can see that being when takes his chance. if not, i could see zaun starting to panic, as they might not have enough to stop noxus.
but even if zaun does decide to help, there might just be too much internal conflict to win with. between
seeing this as a chance to "cure" many people, enough blood to make 
be a constant presence, the chem barons and thieves that are common in the slums of zaun using the war to make stealing alot easier amidst the chaos, wanting to bring everyone to thier knees, causing chaos nonstop, i think it would be much less of a war, and more of complete anarchy. granted, there would be some who would definetilly want to help out, like 
, and maaaaaaaaaaaybe 
, and pretty much all the rest of piltover, but with all the chaos that would be sure to ensue on thier side, i dont think they would be able to hold up against noxus, but i bet they'd put up a fight for sure.
but, this is all assuming noxus would invade piltover in the first place. we all know it's a goal of thiers, but they need to find an opening, thats why they tried to get that map made in the story we saw when came out-along with all the other piltover lore. as as we saw, caught em before they could get it back. noxus is probobly constatly trying to find some way to map out a plan(hehe, pun), but knowing how good piltovers forces are at that stuff, rather than raw strength, they probobly wont get that chance for a looooong time. they'd have to be pretty cunning to get past the eyes of these guys (etc), the only one who could really has been , and i doubt would be interested in handing over info to noxus, unless tricked. that said, she probobly wouldn't have any info to begin with, other that "blow up stuff" knowing her. noxus needs that chance first, and piltover's gonna do everything they can not to let em have it. the only way i could see that happening is if piltover's peeps got too caught up with something like and got disracted. which to be fair, is not an umcommon occurance. however, i dont think it would take all of piltover just to handle jinx, they probobly have for example look out for that kind of stuff while handle jinx, maybe vice versa sometimes.
but, it is fun to speculate if it ever does get past them like in this post x3.
also pardon my spelling/grammer, i know im bad at it xP.
Most of Demacia would probably not want to both and would indeed focus more on fortifying themselves. Someone like might WANT to help but wouldn't be able to outright. So instead she might try to convince her superiors to at least send a small force in secret to at least keep an eye on things (and possible sabotage Noxus at times). would be in this group. She MIGHT have 
with her to help scouting.
Pretty much all of our Piltover cast would try to defend their home however they could. would rally the armed forces, might head back down to Zaun to try and find back up. If 
and 
are still part of the Piltoven science scene in the newer lore they would definitely help out.
would probably help, and it would give him another point to rub in the face of the Piltoven elite. would probably lend her skills, too.
As for Zaun. 
and even would probably help, especially if it seemed the Noxus Threat would be dangerous to the GOOD people of Zaun. 
might be someone drags up, and he'd only help cause he'd be smart enough to know Noxus isn't good for either city. Not sure if would help fight, but based on her new lore she might at least provide medical assistance. 
would surely help Noxus, especially if they promise to continue to fund his research. 
and would skulk around continuing their lives as usual (stinking up the place, killing those that smell of blood, etc.). is the ultimate wild card. Not really all their in the head he would just target everything. would mostly stay out of it, only butting in to cause chaos for either side, though for all we know if gets hurt by Noxus seriously she might just turn the Noxus camps into her knew playgrounds. 
is kind of a toss up I think. He does want to improve the people of Zaun, even if he has SLIGHTLY lost sight of things (like humanity's free will). If Noxus gave him founding and let him "upgrade" some (throw away) troops then I could see joining Team Noxus.
For the man in question, , I think he would be in charge of the main Zaun Defense as they watch from below, middle fingers raised high as they glare up above, "Come down here and just TRY and fight us!"
