There's a new writer for Iron Man 2, Justin Theroux, the man who has just written Tropic Thunder and has started in a string of strong films.

The previous film was written by Mark Fergus, Hawk Ostby, Art Marcum and Matt Holloway - and that's ignoring the amount of people behind the creation of the characters in the first place - who out of them all had the biggest previous credit as Children of Men.

The question is can Justin Theroux deliver something as strong as the first, especially considering that he's only written Tropic Thunder so far, a film that promises to be a pretty straight up comedy in typical Ben Stiller style, and Iron Man was a quite a bit more complex than that, if you wanted to look further into the story.

What's also worth noting is that the Iron Man (Filmstalker review) fans might want a lot more delving into the characters with the second film too, so that puts a bit more pressure on the second film.

It'll be interesting to see how the change of writer, as reported by Variety, works, but as long as Jon Favreau is on board we should be fine.