HyrulianScrolls on 13 March 2018
1. Spring Man
2. Decidueye (feels like GameFreak specifically designed him with the intention of him being in Smash)
3. Ribbon Girl or if she's just a skin for Spring Man, a more random Arms character
4. Captain Toad
5. Rex and Pyra
6. Mario and Cappy (separate from regular Mario)
7. One of the BotW champions (don't think Sakurai would add all 4, that would be a big undertaking alone)
8. King K. Rool
9. Mimikyu (as the most popular 7th gen-er, might stand a shot)
10. Ridley (don't believe he'll ever be a playable character, but fans have demanded him so much who knows)
