For people that don't know, one of the first wallpapers for Age Of Ultron looked like this... As you can see the Avengers are at complete war with the drones of Ultron. But who is flying in the background next to Thor's cape? My theory goes that when Tony had made Ultron that Tony and the following Avengers needed help with this war that they could not win on their own. So Tony and maybe Ant-Man, no. Tony Stark, and Bruce Banner create VISION!