500k or less. The biggest reason is because the target audience is not clear.
The ip by itself is too old and without a major recent release, so many people will have to be introduced to the franchise (not to the characters, but the franchise itself). Given how the graphics and artstyle are awful, I don't anticipate teens or adults to pick this up. Most kids will definitely not know about the franchise itself aside from fox and falco in smash bros. Given that the artsyle is not as colorful or as appealing as mario or splatoon, I doubt this will be the game that wins kids over.
The rail shooter franchise is also too niche to support star fox.
I also don't see starfox winning more than an 85 on metacritic, given it's limited multiplayer options and the visuals. So I don't expect people to think of it as a must have.
The game will only appeal to hardcore old Nintendo fans, and unfortunately that won't be much







