Don't like the hairline being so far back. He look's like he's sporting an aging hippie's haircut. He just needs a tie dye.
Hopefully they will add more hair to the front of his head.
It's definitely accurate for his hairline to be back that far, but he should have a pronounced widow's peak, which he currently does not. That would make all the difference.
design looks nice, but I'll have to pass on this one for lack of any interest in the character. The only memory I have of Mephisto was his encounter with the black panther (Priest). He seemed like a joke/ clown character.
His appearance in Thor is no joke. But Loki is certainly his equal. Thor managed. This pose will come out as nice as XM's Magneto, if they can pull it off.