I love me some Kingdom Hearts.

Fuck yeah, Square has just announced Kingdom Hearts HD 2.5 Remix for 2014 release. PS3 only.

o KINGDOM HEARTS II FINAL MIX
o KINGDOM HEARTS Birth by Sleep FINAL MIX
o KINGDOM HEARTS Re:coded (HD Remastered Cinematics)

2.5 is a follow up to 1.5 that came out a month or two ago.

Here's a new 2.5 HD trailer.

Is there new content? New super bosses?

With Kingdom Hearts 3 there will be. But KH1 & 2 have the "japanese exclusive bosses" from before. They aren't quite super bosses, but they are really hard as you play the story. It's the first time the Final Mix version of the game has been available in the US.