>>16652722didn't an interview somewhere said that the Hoenn remake was already coming out for the DS, but then the 3DS came out, and they scratched the whole thing to get on board with it?
I'd say the remake was in development even before Kalos, because there was stuff they already had, and just had to bring it over to 3D rendering.
The only thing they need really is the overworld, all the other stuff is done already, and move tutors are a perfect excuse not to give new animations, as they'd be "new" just because new pokemon can use them now.