3. Alec Baldwin
Casting Alec Baldwin as The Hulk would be entirely too natural, as he would go berserk as soon as he saw the cameras. For some reason, Baldwin turns into an angry monster whenever he sees someone trying to take his picture, so the studio would be able to save millions of dollars on CGI by being able to have him use his natural gift.
Eric Bana would be interesting. Plus many fans say Eric Bana makes the best looking Hulk/Bruce Banner. Eric Bana will definitely be fit to be in the MCU. Also Eric Bana would look good in any Avengers Movie, and Crossoverfilms.