Re: Characters you'd like to see in future Avengers movies?
Ultron is an iconic villain, but a pain-in-the-ass to introduce into a film.
The reason is that like Venom, Ultron's story was told in a series format, in many comic issues with many phases in his development, rather than a 2-hour film with a clear beginning, middle and end.
Your words will disappear. Your house will disappear. Your name will disappear.