They have the ability in KH3D. I definitely know Lord Kyroo has it in his Ability Link.
It's also in BBS. I really hope they add it to 1.5 as well, but I doubt it.
This may be a dumb question, but are they going to alter the menu screen and load screen? Will these two features remain the same or will they be changed to match the screens in KHII, re:CoM, etc...?
I assume you're talking about how the saving/loading system will work now that its on the PS3 which doesn't have memory cards. It will probably be like the way it was in BBS because the PSP saving system is almost exactly like the PS3's.