I have a bad feeling that either Marvel or Jon Favreau has stepped in the "Batman" trap. Iron Man pushed it having that many stars (Downy, Jr., Paltrow, Daniels, Stamp...), but now that they have signed Mickey Rourke and Scarlett Johansson - I predict trouble in paradise.
Rourke is to play an amalgamation of the Russian villains Crimson Dynamo and Whiplash, while Johansen is portraying the Black Widow. Are they both good actors? Yes to Rourke, he's got Sin City, Kill Bill and now The Wrestler...