Real fighters in the Killer Instinct tournament

If there was a Killer Instinct movie that will take place in the tournament saga with the season 1 characters, which fighters from UFC, WWE & boxing can compete?

Pick whatever fighters you can think of to compete.

Damn, paquiao with a low angle long lens could pass for thunder

Any more fighters you think can compete in the tournament?

Wait, who does Kofi Kingston represent from Season 1?