November 2020 is just right, imo.
I see it playing out like this:
PSX 2019 (25th anniversary): PS5 “announced” (name and release window, along with a single PS5 game shown)
PS meeting Feb-March 2020: specs, shape, and all announced
E3 2020: Additional games announced
November 2020: launch
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.