So it looks like someone is making a guest appearance in the marvel universe as part of the Age Of Ultron.
http://www.bleedingcool.com/2013/03/...age-of-ultron/
Since they're calling whoever it is a guest I'm gonna say its a character they got on license. To further limit the field I'm going to guess that there is no chance of it being someone from any DC comics properties. Even further limiting the field is that it would be someone high profile enough to keep secret AND someone who would have the actual ability to undo the damage of the Age of Ultron given the superhero casualty count.
I would not be surprised if The Doctor from Dr. Who shows up. He has experience dealing with insane robots that want to kill everyone and can travel through time to undo the damage. Its a clean story that doesn't require Marvel to retcon anything. The Doctor also has made cameos in other comics so its not impossible licensing wise. Too much of a twist or possible? Thats my unlikely mostly crazy theory.
http://www.bleedingcool.com/2013/03/...age-of-ultron/
Since they're calling whoever it is a guest I'm gonna say its a character they got on license. To further limit the field I'm going to guess that there is no chance of it being someone from any DC comics properties. Even further limiting the field is that it would be someone high profile enough to keep secret AND someone who would have the actual ability to undo the damage of the Age of Ultron given the superhero casualty count.
I would not be surprised if The Doctor from Dr. Who shows up. He has experience dealing with insane robots that want to kill everyone and can travel through time to undo the damage. Its a clean story that doesn't require Marvel to retcon anything. The Doctor also has made cameos in other comics so its not impossible licensing wise. Too much of a twist or possible? Thats my unlikely mostly crazy theory.