Summer 2020 at the very earliest. I think it would be smart to release it in Summer or Early Fall. Waiting until the PS5 and Scarlet are out wouldn't be a good idea in my mind. And though this is a separate discussion, Switch Pro needs to be at LEAST as powerful as the base PS4. I can't even imagine if Nintendo makes yet another piece of hardware that's in between the 360/PS3 and XBONE/PS4.
I think the Switch's successor would then release between Holiday 2022 and March 2024.
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 57 million (was 60 million, then 67 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 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
