If this version of CoP has local co-op I'd probably get it again. Already have it on Steam and 3DS. VVVVVV I might just buy anyways if it's not too expensive. I love that game.
Huh, that's funny that Cave Story 2 is coming up as a possibility. Dunno if I believe it, but I did catch wind of some new HD Cave Story art that wasn't in the prior releases, so uh... fuck, maybe there is something to it.
In regards to that mystery tease to the right, while the colors are reminiscent of Mega Man ZX, I can almost certainly say that that's Quote in there. I can make out his pale face, green scarf, black shirt, red pants, and of course his hat.
I doodled this myself to illustrate what I'm seeing, although I took a few liberties so things don't line up 100% (also I've just linked it cos it was a little bigger than intended). Still very certain that this has to do with Cave Story, tho.
EDIT: Here's a better comparison image to better show what part I'm referring to-- https://imgur.com/5GneJ9z
And it's by the 90's Arcade Racer dev. There's a good chance that will be out before Nicalis even puts 90's Arcade Racer on Switch because of Nicalis. Keep in mind the last update on the 90's Arcade Racer Kickstarter was November 1st, 2015, about how the development of the game was coming to an end. So the dev has had enough time to actually make another game while Nicalis has sat on 90's AR for roughly 3 years.