Eneid_Elisor
Basically, dear reader, Ultron having shown green eyes now (and not before) meant the following: 1. Ultron was really mind-controlled. But he stopped being mind-controlled when the Avengers witness him die. Cue Stark's panic attack at the very final proof of everything. 2. Pepper's eyes are green. Everyone in this fic notes his features looked so much like Tony, (on purpose), but I had to add something of Pepper, just to plunge the knife into Tony's heart a little bit deeper, once it was revealed. And cuz I like Pep. I wanted her to be included. 3. And Ultron's initial personal reason... his eyes in his past life were a shade of green as well, though different from this one. It was his last memento of the person he was before he accepted his AI life.
It's possible the ancient one might turn up and rewind time to bring the mind stone and ultron back especially with the massive release of energy which would definetly be detected by her and I wouldn't put it past her helping ultron free himself when he is willing to sacrifice his life to protect the world