Leaky Panda, a known insider / leaker group, stated on Twitter that Nintendo currently has two Metroid titles in development for the Nintendo Switch, alongside Metroid Prime 4.
Nintendo is planning 2 new Metroid titles that will release in the next two fiscal years respectively. One is a re-release of Metroid Prime Trilogy HD, the second one is a Super Metroid Remake that mimics Samus Returns in style and scope.
— LeakyPandy (@LeakyPandy) November 25, 2019
What is presumed in development?
The first is a Super Metroid remake and the second is the long-rumoured Metroid Prime Trilogy.
It would be a nice gesture if this is true, as it seems as though Metroid Prime 4 is quite a while away in development terms. The game’s development  recently switched from Bandai Namco to Retro Studios.
As always, nothing has been confirmed regarding the 2D Metroid or Metroid Prime Trilogy for the Nintendo Switch.
But who would not love this to be true?