Quite odd that this is supposed to come to Switch just about when the next console will probably release. I wonder whether this will be the switchover (ha!) title akin to Twilight Princess or Breath of the Wild.
I'm guessing a single release, and the game being used to show off the backwards compatibility features of the next system. Probably the usual 800p-900p 30fps on Switch and something higher when slotted into a Switch 2.
30fps would be a joke on the normal switch. All the Metroid Prime games are running at 60, even the MP Remaster. I'd be surprised if 4 would run at 30.
Were at the end of the generation, this game has been in development for years. If there's a time where the devs really know how to use the hardware to its full potential, it's now.