Personally I don't think either one would be really suited for kh3. I love Tangled (Rapunzel and Eugene) hate Frozen with my life, usually don't reply with things concerning frozen for people get 'passionate' about that topic sometimes but if we had to choose I would definitely go with Tangled because it's just better. (Minus the first few songs of the movie (Can't remember 1st song and I've got a dream)) I sure hope SE doesn't give us another Singing Atlantica world...