I was kind of disappointed in the lack of Square Enix references in Kingdom Hearts, But Tetsuya Nomura himself said that the crossover is no longer as necessary as it was in 2002, given the fact that Disney is well on its way to becoming a monopoly in the entertainment world and pretty much sells itself now. I'm pretty sure Disney doesn't want to share the limelight with another company's IP.
If they do make a KH4, I'd actually like to see Springfield and New New York added as Kingdom Hearts worlds. Disney owns those too, now.


