TH3-D0S3R on 15 June 2017
I do honestly think those are reasonable numbers for each of the 3 games, but I do think Odyssey will sell quite a bit over 10 million. If Nintendo continues this trend of dominating the nostalgic 20's gaming crowd they've been doing who grew up on 64 and Sunshine, and saying that the Switch could sell as much systems as the Wii did (which I honestly do think the Switch will sell bare minimum 80 million units), when looking at numbers for previous Mario games, I think Odyssey could sell a minimum 15 million copies. I might honestly be the bold one and say it could sell 20 million.
It's out there, but I think it's possible.
