There are some minor spoilers for Iron Man 3 and what's been revealed about the second Avengers movie below.
Now, I say this as someone who is a huge, huge fan of superscience in comic books. I love Stark and Pym and Richards and Luthor and all of the other guys that spend their morning designing a robot, their afternoon poking a wormhole, and ignore their dinner in favor of trying to make a shrink ray. That stuff is great - in comic books.
|If you don't like this, I'm not sure we can be friends|
That's why I don't have the slightest problem with Hank Pym not showing up in Avengers 2: Age of Ultron, and why I'm fine with Stark creating Ultron. It's already been established that Stark has made an AI, and that he could easily engineer a humanoid robot. He's exactly the kind of egomaniac who would pattern an AI on himself. And it's a reasonable stretch for the audience to take the character as he's previously been presented and add this one thing.
|Oh no, no creepy robot marriage|