Thinking through who could practically make what's being leaked:
- F ZERO 99 (Arika - development timeline works out with Pacman 99 being withdrawn in October after launching in April 2021)
- Mario vs DK (presumably NST - I might be misremembering but some LinkedIn activity indicated they finished a project this year; their last release, Bowser's Fury, shipped in February 2021 so it seems feasible)
The DS/Wii remake is obviously the most difficult to call. I'm considering whether this is going to be another combined Pokemon Mystery Dungeon title, like 2020's release it would be from Spike Chunsoft and the timeline seems feasible; however, the WiiWare Pokemon Mystery Dungeon title was quite different to the DS game which would presumably be Explorers of the Sky, so maybe this can't happen. Certainly, Spike Chunsoft have had enough time to work on a remake and Explorers of the Sky itself is widely liked by fans, while the WiiWare content never released outside Japan.