Massively disappointed with the Age of Ultron news because the comic event which has just finished was incredibly shite. 10 issues and you never even saw Ultron. Guessing that the movie and comic will share only the name and have a completely different story.
In the comics, Ultron achieves sentience and takes over the world overnight. Wolverine goes back in time and kills Hank Pym (Ant-Man who is getting his own film soon), which then creates an alternate universe where Tony Stark is now Ultron. Sounds reasonably ok but trust me, it wasn't.
I can see them maybe using that overall plot line but all the hows and whys of how they actually get there will be completely different. They can't use Wolverine for a start! And I can't see Hugh Jackman's Wolverine going back in time to kill a friend, even if they did get the rights to use the character.