MCU Ultron enters the MHA universe can anyone hope to stop him?

Just before his battle with the Avengers in Sakovia, Ultron is brought in the my hero academia universe by whatever force.

In his time here Ultron comes to the conclusion that this world will face the same fate as his own and plans to wipe out this so called "super human society" from it's inevitable extinction (he also learns about the quirk doomsday theory so his motives here make more sense)

The pro heroes/villains eventually find out about Ultron and his plans for global genocide before the final war arc and agree to temporarily form a truce in order to defeat him.

Can they manage to defeat him or will Ultron prove to be the end of humanity?

(Also Ultron has access to his army of bodies)