Nah, it's being developed specifically for KH3 with the Luminous engine. They'd basically have to completely remake KH2 in order to do that, and Luminous is a next gen engine anyway, so it wouldn't really be compatible with PS3. Nomura already stated that KH1 had to be completely remade because they lost the original files for it, and that took a few years to do. He didn't wanna remake Days as a whole game because KH3 is their main priority, so remaking KH2 would be out of the question. It will just be a simple HD upscale. Nothing else. They have a lot more to do with 2.5 HD already, with upscaling all 3 games in HD. BBS will probably require the most work because it was developed as a handheld title and the controls will need to be completely reworked.