I voted for Scala because it looks so breathtakingly beautiful, and I bet a lot of plot happens there. But realistically many of these worlds have me drooling. I've wanted Frozen in Kingdom Hearts since I saw it, so long as it's not a musical world. Tangled looks great! Toy Story, Monsters Inc, Hercules, and Twilight Town all look amazing. I wasn't a fan of Port Royal in KHII but if they have improved then I won't mind it. The only world thus far that has me going meh is Big Hero 6. Only the Baymax stuff looks cool, everything else? Meh.