KH 2 has been essentially confirmed for ps3, I'm not sure what it will be apart of. But I know this will be the lead up to kh3. I'm thinking KH 1.5 HD remix released Q1 2013. KH 2.5 HD remix( which will include at least cut scenes from 3D and coded. BBS and KH2) to be released Q4 2013. Then KH3 released in 2014.
I expect the plan is to have every game in the series involved in a HD remix, whether in the form of cutscenes or the actual game, so they can release a KH3 collectors edition which includes KH 1.5, KH 2.5 and KH 3 and probably other random things. But I tell you what that would sell.