Metroid: Samus Returns (2D) announced for 3ds launches September 15.

[PAOerfulone]

Stefan.De.Machtige said:
They will push this remaster out for the 3DS for now and then remaster it again two years later on the NS.
No biggie for me since i got a N3DS.

I think that if they do make a 2D Metroid for Switch, it'll either be a sequel to Fusion or a Super Metroid remake.