Ultron: Infinity

Set in an alternate reality where Ultron has upgraded enough to be able to destroy all life on Earth. He then continues out into the universe to upgrade infinitely until he wipes out all life in the universe. Each Ultron model, even the outdated ones, are still used. Multiples are made of Ultron's previous model after Ultron upgrades again.

Story starts in the future with Ultron 6,745,903,228. It would then show how this happened later. Ultron has eliminated all Badoon (Who are in the present-day), Klyntar, Korbinites (Except for Beta Ray Bill),

The Skrulls, Shi'ar, Kree, Kronans, Beta Ray Bill, Ikon,, have formed an alliance to fend off the Ultrons and hopefully eliminate them some day.

(I'm still trying to come up with an idea as to why Eternity, The Living Tribunal, The One Above All, etc. have not intervened)