During their E3 Spotlight Nintendo briefly revealed the existence of Metroid Prime 4. No information is currently known about the sequel to the cult classic series, other than that it’s in development for the Switch.
Nintendo also revealed Metroid: Samus Returns at their post-Spotlight Treehouse event. Samus Returns is a remake of Metroid 2 for Nintendo 3DS. The game is being developed by Casltevania: Lords of Shadow developer MercurySteam and launches on the handheld on September 15, 2017.