Hmm, It's tough, but Downey might actually make a good Tony Stark. I can't think of many other actors who look enough like Stark and have the acting talent to play the character. Not to mention, the Iron Man character suffers with alot of problems like alcoholism. Similar Downey's own drug and alcohol problems. Iron Man is my favorite super hero, so as long as they manage to make this a good movie I don't really care.