He's the absolute cutest, I'm so happy he's returned
Me too, the moment they revealed not only Marluxia but also Larxene and Luxord I had a hunch that Demyx was obviously going to return as he was another Org. Member we know very little about.
Seeing Vexen in emperors new groove would be fun. Vexen and Yzma going at it?
Having Vexen in the Emperor's New Groove could be an interesting idea as he likes to create experiments and Spells just like Yzma, on top of that even if the film doesn't have the popularity factor it once had when compared to Atlantis and Treasure Planet, the film does have relevance within Disney just like
Lilo & Stitch such as the Mobile app game, Disney Emoji Blitz and Sorcerer's of the Magic Kingdom at Disney world.
I could see Agrabah since his element would be cool contrast to the world environment, but I don’t know what he would want there. Lilo and Stitch could make sense as he is kind of like the mad scientist of the Organization, conducting experiments and creating life forms.
I actually didn't think of
Lilo & Stitch for Vexen since I tend to think of Aqua
(who has been deconfirmed as a Nort) and Demyx as potential darknesses for the world, the former for her connection with Stitch in BBS and the later for his element being water and having his surfer personality. But in a narrative standpoint, it makes sense cause as you said Even/Vexen created experiments and life forms much like how Dr. Jumba and Dr. Hämsterviel created the different 625 experiments and Stitch was an experiment life form created by Jumba. If we might not get the island of Hawaii (as Destiny Islands is returning to the game) then perhaps they can do an original plot set in Space and be the Sci-Fi world for this game, even if I doubt it will actually happen.
Judging by the world selections for this game so far, I don't that we're going to get any Disney Neo-renaissance movies. Outside Olympus which is a tutorial world, and Pirates 3 as the obligitory live-action, everything else has just been modern Disney blockbusters.
I wouldn't consider
Toy Story and
Monster's Inc. as "Modern Disney Blockbusters" Alpha Baymax. True they are CG films like Tangled, Frozen and Big Hero 6, along with the fact that TS had two more sequels followed by a third one coming next year and
Monster's Inc. had a prequel in 2013 and a forthcoming Television series on the Disney streaming service next year. But frankly, unlike Tangled, Big Hero 6 and Frozen, both Pixar movies are actually 18-20+ years older than the former three Disney animated films as the first Toy Story came out in 1995 two years before Hercules was released and Monster's Inc. was released in 2001 which is when the Disney Neo-Renaissance/Second Dark age happened.
So even if we might not get some films from the early 2000's period I still wouldn't mind a Traditional animated world as Hercules is currently the Only Traditional Disney animated world in KH3.