Metroid Prime 4 won't be developed by Retro Studios and i'm okay with that.

[Miyamotoo]

Reardles Retro game, I think its holiday 2018. game, Nintendo definitely didn't showed or anancued everything they have for Switch, they saving some announcements for some of next NDs or next E3, but I any case I think that Retro game will be 2018. game, same goes for Next Levels Games game.