Chickenfoot
Devourer of Cakes
Towns Folk
I doubt there will be a DDD FM, mainly because there's not much room for improvement like extra bosses, mushroom-like enemies, new areas, etc. However, i agree that a KH game with the old gameplay system would be great and if something like that happens, it'll probably be a remake of KH 358 2 Days or a final mix version of it. If I'm right, i will buy it right away, since it's my favorite semi spin-off.
I absolutely agree with this, I don't think that they could improve on the game much as it stands. They could possibly make one however, as a bridge between 3D and 3, but it seems highly unlikely as well, as the story of 3 is supposedly going to start right after Riku and Sora's Mark of Mastery exam. At this point it seems more likely that they will make an HD version of it for other consoles, or (if we're really lucky) an HD remake of all KH games released on the DS/3DS