I'm amazed we haven't seen a physical printing of Cuphead. That's a game that surely could meet the 20k threshold.
Just look at ebay prices for the empty cases w/ art cels that Best Buy had a couple years ago: https://www.ebay.com...d xbox&_sacat=0
I'm pretty sure at this point the developers of that game will be doing their own release(when the time comes), and probably just for the NS at this point, but who knows? They also have DLC coming down the road, so I'm sure their probably waiting for all that before offering a physical release.
I would assume most would buy on the NS over the ONE, as it performs just as well, and at least with the NS game, you technically get two versions(home and on the go). Since CH is pretty much a MS title, I'm sure they could print in qty's they want vs. some minimum requirement, and I'm sure the OG fan base would still want this game in a standard release or CE if possible, so why not?