It will be some brand new name that has never been used before, because Nintendo is usually gives an original name to these mid-gen upgrades. It will most definitely not be called "Switch Pro", because they aren't going to copy a Sony name. Sony copies Nintendo, not the other way around.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox