I don’t see why Mai is still used as a point against characters like Doomguy when her problem was CERO being more against upskirts than guns; Sakurai likely didn’t want to mess with her design, or SNK didn’t want it. If they wanted to, they could still get Doomguy, though it seems they’ve decided on other characters.
Not to mention, from what I’ve read from other users, Joker’s way of summoning his persona is...oof, and they censored him just fine. The blood that would’ve been in his final smash was also changed to stars. Doomguy can work just with brutal moves like Ridley.