He could play as Tony Masters/Taskmaster, the real one in the MCU

Jason should be Union Jack while Jon Bernthal needs to return as Frank

There isn't a "real Taskmaster".

No recasting Frank.

@Marvelus They could easily work Tony Masters in if they really wanted to.

Pete Wisdom, perhaps

Rob Delaney is already Peter Wisdom in Deadpool, so he would return in Deadpool 3 if he does.

Jason Statham has no range. He only works in a certain type of role and he doesn't have the chops to play a multi-faceted character like Frank.

Antonia Masters is Tony Masters in the MCU. Simple as that. There's no real Taskmaster somewhere out there.

Actually I think John Bernthal played a great punisher