From a video on SuperBot's official channel:
(Forward it to 4:36)
You can see the already released 20 with an added two ? marks. Hopefully that's Crash and Spyro!
"That is all the characters" - Omar
"Hey guys, look at this! There must be more characters"-fan
"Why won't they just be straightforward and tell us who is in the game!!!"-fan
"Lol wut"- Omar
Welcoming Committee- "The business of gaming is business"