I realistically think we have 5 newcomers left.
2 in this month's direct + 1 or 2 echoes
3 in November + 2 or 3 echoes.
These 5 uniques are probably the biggest guesses people make (aka, were supported constantly with Ridley and K. Rool or have been rumored):
- Geno
- Isaac
- Incineroar
- Skull Kid
- Banjo and Kazooie
These echoes are usually the biggest guesses as well:
- Isabelle
- Shadow
- Dixie
- Ken
If there are more than this, amazing. If there are less, we already have 71+ characters to play as.
If not these characters, characters like Elma or BWD or Rhythm Heaven are good alternatives (OR additions if we get more than we think). We'll see what happens soon enough.