Nope. Other than his Hellfire and Inferno variations representing his revenant powers, ol' skull face is gone (especially now that he is human once again). Not to say it won't be represented in a future DLC costume, or classic fatality DLC.

Since his conversion back to human it seems that he lost the toasty. Kittelsen spilled something hinting at this, if not outright confirming it.

Vogel also confirmed this. He can't go skully anymore.

He does have it in the comics when he is back to being human. He still has hellfire and the ol' flammin skull, but chooses to not use it for fear of losing himself again. Would like to see it in game if they would add it in the near future DLC.

Yeah, do the first Special Forces faction kill on him and BOOM there is your flaming skull Scorpion ;)