Lethal Weapon creator Shane Black is to step into John Favreau's shoes to direct Iron Man 3. Black is a veteran screenwriter and was once the highest paid writer in the business but after a ten year break he came back to critical acclaim by directing Kiss Kiss Bang Bang (a film i thought wasn't up to much actually).
Black's quick witted style of dialogue, character interplay and action was always balanced well with genuine emotional depth so right now I think that Iron Man might have struck gold by signing him up.
No plot details as yet and it's slated for a 2013 release so don't hold your breath. But here's a picture of the lovely Gwyneth Paltrow as the ever faithful Pepper Potts to keep your mind off it.