I think the floor is 3 million.
A little off topic but I think Prime 3 would have gone on to outsell Prime 1 and gone on to sell 3+ million if Nintendo didn't release the Prime Trilogy in 2009, effectively cutting its legs. Not that that's a bad thing. Just thought I'd get it out there.
Depending on when the game releases relative to the Switch's life cycle and how Nintendo manages it's release, I think its sales could range from 3 million to as high as 6 million.
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