The mention of Kirby 64 intrigues me. Reason being that I though it would be nice if the style of Kirby 2, 3 and 64 gets a return to form in a new game, rather than the Super Star style.
What do I mean by this? Essentially the former group (directed by Shinichi Shimomura) are more slow-paced and puzzle-like and feature animal friends, while the latter is more fast-paced and fighter-like (and is a product of Masahiro Sakurai). The later games take after Super Star the most. Certainly, the latter group is the most enjoyed one, which is probably why it's still the direction of Kirby games (as seen with Planet Robobot).
Of the later games, Kirby and the Rainbow Curse is the closest to embody the former group, where the games are more puzzle-oriented and the pacing is on the slower side. It doesn't fully count since it is not a traditional experience, but the feel of this game is on par with Dreamland 2, 3 and 64.
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Anyway, I would also like to see Wario's Woods and Puzzle League both make a return. Although action puzzlers aren't popular in this current gaming climate, both experiences were a blast.
Thanks for reading.