Justin Theroux managed to write the Iron Man 2 script solo while combining the elements fans love of Tony, some key story arcs, the Black Widow, and a lead-up for The Avengers. The movie made over $50 million more than its predecessor worldwide and got mostly positive reviews. I get it isn't as popular as the original and didn't totally destroy the box office, but I think the consensus opinion is Theroux did a good job. Yet there was never any talk about bringing him back for the sequel. Did he not want to? Or did Marvel Studios just want someone else? I think this is a bad sign for Iron Man 3 and I would like to know the reasons behind this choice.