Originally Posted by Ant-manic
it's too early to tell what will or won't be rational. if, for some strange reason, Pym is appearing only in flashback or a retiree in the Ant_man movie, it'd might not be as logical to use him as Ultron's creator.
i don't see how it'd be superfluous to Stark. it'd be the logical next step in his evolution. he starts out as the best weaponeer on the planet. he sees how dangerous these weapons can be in the hands of others. he fights to take those weapons back.
next part of the story involves others trying to replicate his weapon and Tony discovering a higher purpose (thanks to his father's recordings).
then comes extremis; human "iron men."
next...the weapons, themselves, gaining sentience i.e. Ultron
I wouldn't mind Stark building Ultron while Hank is credited for the AI.