Joel Edgerton

This might seem as an odd choice, especially since Joel Edgerton isn't known for having played in too many action movies. But, as far as I’m concerned, this is what actually recommends him for the role of Deathstroke. He is one great actor, and, if the Terminator will keep his mask on, he'll have to convey all of his emotions through his eyes.

And you cannot deny the fact that Joel Edgerton is a talented actor.

Furthermore, if you saw him in Warrior, you do know that he can do action movies. By far, even opposite Tom Hardy, he still shone. And his action sequences were truly breathtaking. The only problem is that he seems to be very busy.

However, just for a cameo, I guess he can find the time.