Im also not saying it WILL happen, but that thought just came to mind.
However on your second point, Urgots release is kinda unique, for one he was shown much longer before the patch than usual (He was shown a week before his actual PBE patch, while most new champs and reworks are shown about 1 to 2 days before patch) On top of that, Urgot hasnt gotten a skin in a LONG time, and while you can say the same for, well
for instance, no reworked champ has had a skin concept the ENTIRE COMMUNITY said they wanted. As well as Urgot i believe has been in development for a decent bit longer than usual, this could mean that they were struggling (although i beleive somewhere they said that his ult was a first iteration) OR that they were also developing a skin at the same time, as well as him being pushed closer to when SGs were released.
Now again, im not saying its true, but it isnt COMPLETELY unfounded.