Originally Posted by Ant-manic
given that Iron Man is on the way out, there probably wouldn't have been too much Jarvis left to see.
RDJ still has at least one more Avenger film after AoU. But I keep coming back to the Extremis Armor: if he builds a version of that, or Bleeding Edge, the suit essentially becomes literally a part of Tony. It's possible that Tony won't be able to integrate Jarvis into that suit (Tony is essentially a cyborg with that armor), so morphing him/it into the physical form of Vision would be a great way to keep Bettany's voice and personality around for future Avenger films.