Think of a superhero. Take their alter ego's last name, and the last word of their nickname, and together you’ll get the full name of a living actor. That actor’s most famous role kind of sounds like a superhero, and in fact has three letters in common with the original superhero. Who is the actor/role?
Bonus connection: if you think of this character's name as a superhero, and consider who might be his nemesis (i.e. opposite), you get the last name of another actor, who portrayed an ally of the original superhero in the movies. (I doubt this helps, but I thought it was cool.)