Paul Bettany the voice of Jarvis in the Iron Man movies will be playing Vision in the upcoming Avengers: Age of Ultron. Due to the Ant-Man casting everyone began making dumb guesses about how the two movies would tie-in. I'm not going to throw my guess into the ring because frankly there are too many hats in there already, but I will point out that they've said a few times already that Hank Pym does not create Ultron or Vision in the movies, but rather that Tony Stark does... so yeah sit on your hands and stop guessing. Sadly I think this films cast is still smaller than it could be considering it's a team movie sequel so kudos to Whedon and company for not going ape. Source