Will Whedon's exit from "Iron Man" bury it?

Coming Attractions reports that the superhero adaptation of "Iron Man" may be dead in the water. The scooper says ""Joss Whedon decided that he should spend time on properties he creates, and opted to do Firefly… so you can count him out of this one. He was off the film before he ever got on. The McCanlies script is dead, and so is the project for now."