Why I think Ultron Will Appear in Captain America: The Winter Soldier?
Now why do I think Ultron will appear in Captain America: The Winter Soldier you ask. Now my theory started with the SDCC footage of the film. In the footage Alexander Pierce says these words "To build a better world sometimes means tearing the old one down. And that makes enemies.". Now I've been thinking for a while about how he would accomplish this. I mean I don't think that the Winter Soldier, Crossbones, and Arnim Zola can take out the entire planet unless they have one murderous robot on their side. Or perhaps I should say a couple of thousands of Ultrons. Now I got the idea of an army of Ultrons from Avengers: Earths Mightiest Hero because int here there isn't just one Ultron at first instead there is a veritable army of Ultrons. Another thing that gave me this idea was the above concept art. You see in the art You can;'t really see just what exactly the Quinjet and all the other soldiers are attacking all you see is explosions.
Now On To My Ultron Creation Theory
Now I know many people believe that Tony Stark will be the creator but I don't think it will be that simple. You see I think Ultron's exact creator will be left a mystery but will be hinted at in Age of Ultron and The winter Soldier. Yet I believe the form he will use to take on the Avengers will be created by the Avenger, or at least indirectly. think the members will be involved in his creation as follows.
Iron Man: As shown in the Age of Ultron teaser I think that Ultron's body will be built out of an Iron Man armor which will be Stark's role in Ultron's creation.
Thor: I think Thor will lend to Ultron's creation by being the source of his weaponry. Either through some left over Dark Elf and Asgardian tech in the dark world or some Chitauri tech from the Avengers which was brought by Thor's brother Loki.
Captain America: I believe his role in the creation of Ultron will either be that his battle with Alexander Pierce will be Ultron's example for why Ultron thinks humans should be destroyed or he will search for vibranium after seeing Cap's shield.
Bruce Banner: Doctor Banner I believe will be the creator of Gamma radiation power source that Ultron will use. After all even in the comics he uses a nuclear generator as a power supply.
Hawkeye, Black Widow, and S.H.I.E.L.D: Now I think these three things will lend to Ultron the final piece that will make him an powerful threat to the Avengers. As seen in the Avengers and Iron Man 2 S.H.I.E.L.D makes assessments of those who were being considered for the Avengers Initiative.. I think these assessments will be very valuable to Ultron and will be what he uses to try and take down the Avengers
So that is the end of my editorial so remember to sound off below.