So far we had:
Bilgewater - Miss Fortune Ionia - Zed Noxus - Darius Demacia - Lux
So, who do you think? I think the Shadow Isles might be Elise.
Aren't these just older animations they used for character exploration that they decided to share? I don't think they have one for each region.
I am so disappointed Riot OVERUSES so many champions in their animations when there are so many champions that have nothing close to an animation.
Lux already got her ultimate skin animation.
Darius was already in "A New Dawn".
Zed was in the Xayah+Rakan reveal.
Garen was in 2 animations already.
Katarina also in 2 of them.
Don´t talk about how often Ryze was in one....
If they use Jinx in any of them I just go kill myself....
Honestly, I hope for Thresh, Yorick or Mordekaiser for the Shadow Isles.
For Piltover, it would be cool to see Camille, Vi or Caitlyn.
Zaun either Jinx or Singed
not so sure who I'd want to see for the rest.
Only 4 is going to be released but they also said they will consider making it further.
So, I would want Xerath if they ever go with Shurima. Because every character animated in these 4 are mortals. And Ascended except Xerath are beings of flesh and blood. Xerath would be a unique presentation. Though they would like go with Taliyah or Sivir.
What I wish
For shadow isles in priority : 
(at least hecarim and tresh got a whole story)
Bilgewater : 
Freljord: 
(don't ask me why,because I don't know either)
Shurima:
Zaun: 
(for the glorious evolution!) or 
(for the boobs) or 
because he is cute.
Void: 
(because he is cute) and 
(because i want to see how they would animate the nomnomnom)
Piltover: 
Bandle city: 
I'm sick of always seeing the same champions ,or only the flashy ones (rito,stop zed favoritism plz). I'm almost sure none of these champions will get their own animation (maybe an exception for gangplank).
Knowing RITO,it'll be
to fullfil 
fantasy
for more boobs
or 
for the same reasons
for the boobs and 
for more flashy shit
for her scoliosis
because 
(wink wink)
x
(wink wink)
and also 
becoz fok u
Only four being shown I think.
I really don't think that the idea of these animations are that they represent certain regions. Riot said that these are older animations that were worked on but never saw the light of day, so they put a little bit work into them so they could present them in short videos. by all rights it's entirely possible for them to show two champs from the same location in a row just cause they had some spare art from them and they could be touched up fast enough.
For shurima they will most likely go with Azir. I wish they would take Taliyah tho.
Please if make more make the shadow isles champ yorick. He needs some love even riots making fun of him at this point.
I'd like to see Viktor involved in the Zaun/Piltover one. It would be great to get more information about the Glorious Evolution.
