Originally Posted by Hypestyle
Side note: I suppose that Ultron could be responsible for the destruction of Transia, which dovetails into the inclusion of Quicksilver and Scarlet Witch.
Didn't think of that...that makes a lot of sense actually. And they'd come looking for revenge against whoever created Ultron (...who I'm thinking will be Tony).
As for actor...I wouldn't be surprised if they get Vin Diesel to voice Ultron and play Vision.