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...
I’d bet against this - seems like a very not-Nintendo move.
The closest I can think of might have been delaying BOTW for so long so it could go from being Wii U-exclusive to a dual release helping to launch the Switch. But as much as Nintendo loves remaking games, I don’t think they’d launch a new console with a remake of the most recent Zelda game.
I’d bet on the new console launching with a 1-2 punch of both Mario Kart 9, and a brand new main series Zelda or Mario game.
With how weird the new Mario game is, I swore that it was going to end with a Switch 2 announcement. Even in the direct they never mention that the game will be on Switch (though the standalone trailer does).