So whilst I did enjoy Wish and there were some great songs in it, like many people I also felt that it didn't quite live up to Disney's previous classics. However I think there's potential for it to be a great addition to a future Kingdom Hearts game due to its themes and unique animation style. The climax of the film is especially perfect for Kingdom Hearts as I've demonstrated in the image below. Plus Magnifico could spawn an intimidating Heartless which would make for a great boss battle! What do you think?

I was just thinking about this earlier today. although I'd have the boss fight be against maginfico. also the idea that the wishes are pieces of people's hearts fits KH