I mean obviously Zelda should be the next collection, with Zelda's 35th anniversary coming up in February, and there already being rumors that they'll do something with it like they are doing with Mario. I'm assuming they aren't gonna put 5 Zeldas in one package, since they couldn't even be bothered to put both Galaxy's in the same collection, so I'm guessing Zelda collection of OoT, MM, WW, and then maybe TP HD and SS HD sold individually or as a second full price collection.
Also Metroid Prime Trilogy of course.
Pikmin Trilogy would have been nice instead of just 3 Deluxe.
How about a Mario Kart Collection haha. Super, 64, Double Dash, and Wii all in one Collection, with online play and HD resolution...I just miss Double Dash.
Donkey Kong is just a much less popular franchise. Those aren't major sellers, and the best ones were on SNES, so they will all eventually be available on Switch Online. DK64 sucked and there is no need to ever revisit it, and Switch already has a port of the last one, so the only one of the modern games (DKC and after) that is missing is the Wii game, well I haven't played Jungle Beat but that doesn't lend itself as well to normal controls since I am guessing the fun of that was playing on the bongos. It would have been nice if Nintendo had thrown in the Wii DKC in the cart with Tropical Freeze, that way upping the price to $60 would have been more justified. But yeah I don't really feel the need for a Donkey Kong collection at all. Maybe just a collection of the old school pre-DKC games on the eshop for $20 or something, but I don't really think thats a big deal.