Huh - I poured over figure lists just now and that sculpt has only ever been released in the Icons Starter Set... from what I can tell there shouldn't be any variants or anything, either. But it looks pretty clearly like a part of the sculpt. Spooky!
Is it something where only the veteran has the hat (like Booster Gold where only the veteran has the star on his chest).
I did it. hehehe
Laugh it off bleaches!!!! HA HA HA AAH HAA HO HEE HA EEEH HA HAO!!!! J/K