Since the first Kingdom Hearts game and Kingdom Hearts II (as well as re:Chain of Memories) are PS2 games, I do play it somewhat often. They are all great games, I also enjoyed the game Rogue Galaxy by Level 5. However, I am seriously hoping for HD remixes of the Kingdom Hearts games for PS3. I believe Nomura himself said that he was doing research on it!
I would expect the Princess & the Frog to make an appearance in a future Kingdom Hearts game, specifically because of how important each Disney Princess has been so far. I would not mind this, but what I am really hoping for in KHIII is mainly 2 things--That we see classic worlds return, such as Aladdin, Lion King, the Little Mermaid, and so on--and that we finally see a Pixar world.