Reddit gives credit to this youtuber, that in the past has leaked some Nintendo things including Metroid Dread
https://twitter.com/NWeedle/status/1266833951898906632?s=20
Translation
"Leak Express: New Metroid 2D for Switch could be "Metroid Dread"
It would be the sequel to Fusion.
This game...
Wow awful take. Too many Metroid as of late? Are u serious?
We waited 20 years for the next game after Metroid Fusion to come out!
Meanwhile they pump out Mario games like every year