History
Ultron-59, trying to exact revenge on the Avengers, left the "Last Avengers Story" in the Time Capsule he broke into so that Kang would find it in the future. Kang did, of course, and allowed the plan of the story to be carried out by Ultron-59, Oddball, and the Grim Reaper.
Ultron challenged Hank Pym to bring the Avengers together once more for a challenge, or they would all die separately.
In the final battle, Ultron killed Jessie Wingfoot and released a horde of Ultrons before being destroyed himself by Vision, who merged the two of them to stop him.[1]