True, this is still only rumors, but from the beginning they said that this was going to be a game that takes full advantage of the Switch 2 hardware. Time will tell, but Nintendo hasn’t been shy about releasing cross-platform games if it’s feasible. Much as they hate emulation, I don’t think it holds them back from doing so, as the install base for the Switch 1 is huge and they like making money (not that you’d know from some of their decisions…).

I think this has been planned as a Switch 2 only title from the beginning due to being too advanced for the Switch 1.