I really wish they would port Metroid: Samus Returns over to the Switch...sounds greedy but I really want to play it but I'm not buying a 3DS or 2DS for it.
It's possible! Wii U got a DS Virtual Console, so Switch might get a 3DS VC in the future.
Metroid Samus Returns? Gameplay, controls/mechanics, music?
Gameplay: Very much like Super Metroid or Fusion, but with the Metroid II mission of killing 40 Metroids.
Controls: Controls are good, but you need to get used to the new 360 degree aiming. You have to hold down a shoulder button to aim
without walking at the same time, or else you'll keep walking in to enemies you're just trying to shoot.
Mechanics: The new melee counter takes a bit of getting used to - you'll need to have patience with some enemies that you can't just shoot, you need to get a feel for their attack pattern and counter them.
Music: Very much like Metroid Prime, which is a good thing. You'll love the music.