Already I've been hearing these predictions from a youtuber: Arlo, which I relate to.
Metroid Prime 4 (A too desirable wish, but it is a innovative thought.), Paper Mario 3 (Counting out the others since different play styles.), Pikmin 4 with a map editor, and Luigi's Mansion 2 (Not counting for Dark Moon.). Those are the top four I was rather agreeable wish, while the rest was 'what ifs', but these conclude towards that sort of example.
For my wishes:
More new IPs to bring Nintendo back to it's routes. Arms, and Splatoon 2 is a good prime example of that so far. I hope to see Mario & Luigi + Bowser's Minions to be a HD remake with polished graphics (Though I am crossing my fingers with how they will manage the battle systems.).
Animal Crossing for the Switch, puh-please! Having it's release date slated for 2018 would be such a relief for my wallet.
I think that is all? Most of my ideas was basically given away, so that is all I could think of for now. Again, they are just these 'want' predictions, despite Nintendo clearly states some are no longer accepted as an idea.
Oh, wait! I am wanting to see if Mario Odyssey has a proper hub world instead of flying to each destination. That was something I really missed from Mario 64, and Super Mario Sunshine.