Everyone was excited about the possibility of a new Metroid Prime, as Nintendo announced Metroid Prime 4 for the Nintendo Switch during it E3 Nintendo Direct. However, it appears that a new dev team will be at the helm instead of Retro Studios, the team that has been developing the internal Metroid games since the series launched on GameCube in 2002.
The new team will be headed by Kensuke Tanabe, Nintendo's Bill Trinen told US Gamer. Tanabe has been Nintendo's producer for all of the Metroid games done by Retro. Trinen wouldn't offer any other details on the "talented new development team," so it is unclear if this is an internal team or an external development partner.
Retro has previous announced it was working on a new title for Nintendo, so this could be that Retro has a lot on its plate, or Nintendo may not feel comfortable giving the Switch game to the developer. Metroid Prime: Federation Force for the 3DS and Metroid Other M were the only previous Metroid games not developed by Retro since it took over the series. They were handled by to Next Level Games and Team Ninja, respectively. Retro's most recent release was Donkey Kong Country: Tropical Freeze for Wii U in 2014.