Great thread. Here's what I'm thinking:
Now that Switch is revealed, I think it's safe to say:
Production Group 1 = Mario Kart Switch
Production Group 2 = Splatoon Switch and I'm thinking they might be working on Animal Crossing Switch as well. The Japan domination 1-2 combo.
Production Group 3 = Breath of the Wild along with Nintendo EPD Team
Production Group 4 = Pikmin Switch or possibly a new 2D Mario?
Production Group 5 = Just finished Star Fox Zero, probably nothing in the near future. I don't think they'll be making any Wii ____ titles any time soon, either.
Production Group 6-8 = Too hard to call. Could be anything. Maybe a Donkey Kong title? Yoshi?
Production Group Tokyo 1 & 2 = 3D Mario for Switch
Retro is working on something. Hopefully Metroid, but probably not Metroid.
I'd love a new Good Feel title. I can't imagine all of their resources are devoted to the 3DS port of Wooly World. A new Kirby, Zelda or something else entirely would be sweet.
Another interesting thing to note is just how long it's been for a lot of these teams since their last big title for handheld and console:
1 - Mario Kart 8 (Wii U, 2014), Mario Kart 7 (3DS, 2011)
2 - Splatoon (Wii U, 2015), Animal Crossing New Leaf (3DS, 2012)
3 - Zelda: Link Between Worlds (3DS, 2013), Zelda: Skyward Sword (Wii, 2011)
4 - Super Mario Maker (Wii U, 2015), Pikmin 3 (Wii U, 2013). NSMB U and 2 were released in 2012 for Wii U and 3DS.
5 - Star Fox Zero (Wii U, 2016)
Tokyo 1/2 - Super Mario 3D World (Wii U, 2013), Super Mario 3D Land (3DS, 2011). And Captain Toad was 2014... not sure if I consider that a big game. I'm sure they were already working on the next 3D Mario during that game's development.
So, to me, the timelines line up where we could realistically see a new title from each of these teams in 2017, with the exception of maybe Production Group 5.