Also, if we DO get new characters (I'd be okay if this was the final roster, but I doubt it), what could you expect: I'm gonna say:
Decidueye
Geno
Captain Toad
Spring Man/Ribbon Girl
Minecraft Steve!
That;s my guess, if I had to guess. I would have said Dixie Kong, too (As an echo fighter to diddy), but I figure if she was coming she would have been announced at the same time as King K Rool.