Originally Posted by DrCosmic
You're overcomplicating it. The Avengers create Ultron. It's that simple. Joss is not some cryptic speaker who refuses to do things that have been done before. What makes Tony Stark not Frankenstien is that Ultron is created by the Avengers... it's a team effort, it's personal to all of them. ((Side note: That is SO much better than one person being the creator, and thus, bearing all the emotional relevance during the climax of a film that's supposed to be a team thing.)) And JARVIS has already been HAL9000 in IM3... now it's time to take it a step further, which will be awesome.
How is "Stark creates cybernetically implanted Iron Man armor inside his own body; evil AI hacks in and takes over" overcomplicating it? That's a lot more straightforward and easy for audiences to swallow than trying to come up with a logical reason that The Avengers would pool their resources to create a killer robot that even they can't defeat for a government agency they don't even remotely trust.