Don't forget the ps3 was dropped not because by lack of love from devs, but because the game was using everything the console can give out, and without dropping the ps3 it were not possible to do new/oher stuff the devs are going to put in with next expansion. Ps3 is just the first victim, then will be the ps4 turn (as later as possible, I just bought it omg).

Devs clearly stated (by Yoshi's interview if I recall it correctly) they want the game in every platform possible.

Possible means a platform (hardware+legal stuff) that can deliver all that the game have to offer to the player. The interest towards Nintendo's Switch wasn't unexpected.