Nintendo announced not one but 2 Metroid games at E3.
Metroid Prime 4 is coming to Switch but we are getting a 2D Metroid on 3DS and it is a remake of Metroid II. Metroid: Samus Returns has a trailer that you can watch below:
Metroid: Samus Returns will release on September 15 on Nintendo 3DS.
Source: God is Geek