I thought of some others that aren't mentioned but have a slim chance and aren't from japanese developers
1. Earthworm Jim he was a rival with Mario at one point he was referenced by Nintendo even in Donkey Kong Country 2.
(Also Earthworm Jim vs Megaman would be epic Just saying
2. Banjo-Kazooie chances even slimmer than Jim's since he belongs with Microsoft.
3. Rayman actually has the highest chance of making it out of the three Jim being second, he has three trophies in smash for Wii U
(Maybe he's DLC but Sakurai's keeping DLC very secretive)
They could put DLC like Mario kart 8 Release it 7-8 or more months later.
1. Earthworm Jim he was a rival with Mario at one point he was referenced by Nintendo even in Donkey Kong Country 2.
(Also Earthworm Jim vs Megaman would be epic Just saying
2. Banjo-Kazooie chances even slimmer than Jim's since he belongs with Microsoft.
3. Rayman actually has the highest chance of making it out of the three Jim being second, he has three trophies in smash for Wii U
(Maybe he's DLC but Sakurai's keeping DLC very secretive)
They could put DLC like Mario kart 8 Release it 7-8 or more months later.