I was thinking over this while writing and, how much should a desire for revenge, justice shape your characters journey? With mine I was considering having him solely driven by that desire, when he has his villain cornered and charges blindly, fueled with rage only to watch as one of his friends die because of it. He has companions, he has allies but all of them are insignificant in the face of his enemy, if they stand in his way then he removes them from his path, it's only towards the end that he realizes the full extent of his action/or rather his lack of action towards his friends that ultimately ruins him. But should the character have more, should there be more to him? Or is his embodiment of rage, fury enough to drag him over the line? In this case there's not so much character development in the MC but in those around him as they realize just how far he's willing to go.