Robert Downey Jr. returns as billionaire "Tony Stark" aka Iron Man (no secret identity issues here, as he outed himself in the first movie). Reoccurring characters include Gwyneth Paltrow as Pepper-"I-nearly-slept-with-my-boss"-Potts, and Samuel L. Jackson as guest-star-at-credits'-end "Nick Fury" of S.H.I.E.L.D.
Terrance Howard has been replaced by Don Cheadle as "Col. James 'Rhodey' Rhodes" (aka "War Machine" in the comics). Amidst all the internet-rumours swirling thus far (I read but not post) - the sequel seemed to have taken on a more Soviet-flavour with the inclusion of Scarlett Johansson as super-spy "Natasha Romanoff" aka Black Widow, and Mickey Rourke as "Ivan" aka Whiplash (not Crimson Dynamo as everyone had hoped, it seems. And "Whiplash" is a woman in the comics). Sam Rockwell rounds out the "villains" as fellow-billionaire and Stark-Industries-competitor "Justin Hammer". [All info via IM2-IMDB credits].
Will be updating both TOYSREVIL and this dedicated-movie fanblog with anything and everything IRON MAN 2 movie and toy news to come - leading up to the film's premiere in 2010. PM me info and news at firstname.lastname@example.org :)