Avengers 2 Gets a Title And a Villain

This weekend at Comic Con, Joss Whedon announced the title for the second installment of the Avengers franchise: Age of Ultron. The title refers to a Marvel supervillain, Ultron a living automaton that wipes out all of mankind beginning with the Avengers. The title also suggests that the superhero Vision will most likely make an appearance in Avengers 2. Is this the role Vin Diesel signed up for?