“It’s good to be back!” Those are the first word uttered by Tony Stark, played with glee as ever by Robert Downey Jr., as he lands at Stark Expo after jumping from a plane, with AC/DC playing gloriously in the background. Man, what a great kickoff to the summer movie season. This is indeed Iron Man 2 in the sense that this time around Tony will have to share the spotlight with a second man in an armoured suit in the shape of his best friend James Rhodes (Don Cheadle, stepping in for Terence Howard). The introduction of this second iron man, or War Machine, is one of the many sources of conflicts in the story since the government does not trust Mr. Stark when he tells the government that his technology cannot be reproduced, putting him at odds with a senator (Gary Shandling) who wants him to turn over the technology to the military, for whom Rhodes works. Watching Tony bask in the glory of being a superhero is the movie’s main villain, Ivan Vanko (Mickey Rourke), a brilliant Russia...