Robert Downey Jr.: Ready for 'Iron Man'

The reformed bad boy is back on the industry's radar. It's probably that flying metal suit he's wearing.

TO become a mega-movie star these days, a man must don the tights. With a few notable exceptions like Leonardo DiCaprio, who had the good fortune to be in the highest-grossing movie of all time (that would be "Titanic"), almost every $20-million man has done his time as a caped crusader, masked marvel or some popcorn equivalent, such as a pirate or extraterrestrial G-man. Call it the Nicolas Cage career plan, in which Cage traded in artistic cred for more muscles, Bruckheimer-bravado and enormous paychecks. In his canny wake have followed Johnny Depp, Tobey Maguire, Keanu Reeves , Will Smith -- the list of stars who've streamlined their individuality for mega-stardom goes on and on.