It's a bold claim. Super Mario Odyssey is a huge hit, critically and commercially. Do we need a direct sequel? No. Is there a good chance we'll get one? Yes.
Whatever year Breath of the Wild's sequel doesn't come out in 2020-2022 would be a great time for Super Mario Odyssey 2. I think there's plenty of ideas they could implement. Maybe they could mix power-ups with the Capture Mechanic. How about adding Luigi and finally having split-screen? Throw in Yoshi to ride as well. And don't use the tired Bowser kidnaps Peach plot. You could have different enemies. Basically, there's a lot of potential.
Lifetime Sales Predictions
Switch: 125 million (was 73, then 96, then 113 million)
PS5: 105 million Xbox Series S/X: 60 million
PS4: 122 mil (was 100 then 130 million) Xbox One: 50 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima