We've known for a while that Robert Downey Jr's contract with Marvel expires after Avengers 3, but based on this clip with Ellen, he might be donning the suit for at least one more solo film.
The Avengers 2 got the front cover of Entertainment Weekly just days before Marvel takes the stage at San Diego Comic-Con, and some choice details about robotic baddie, Ultron, have been revealed. Like many have speculated, Ultron will be a creation of Tony Stark's: an automated superhero defense system.
With Ultron in place the Marvel team can take a break from world-saving. Unfortunately, Ultron's hyper-intelligence begins targeting mankind as the planet's biggest threat. Time to get the band back together.