Re: Casting for She-Hulk
I say when Mark Ruffolo's (spelling?) contract is up and he no longer wants to play Hulk, why not just have his cousin come in to join the Avengers? Go back and reveal her origin in a flashback (that she was hit by a car and had to get a transfusion from Bruce) and there you go. No need to recast him and no need to make a whole movie about her origin.
And I agree. Best way to go is the Dr. Manhattan way.