Avengers: Age of Ultron - Even Thor Can't Fight Ultron

Thor himself, Chris Hemsworth says that Ultron will unleash an unstoppable force that will effect the entire universe.
Plus, life without Loki. And who does Thor have a sprawling fight with?

A Few Too Many Strings — Avengers: Age of Ultron

Is that hard to beat Ultron? - Thor - Comic Vine

Why wasn't Captain America a match for Ultron in Avengers: Age of Ultron? - Quora

15 Funniest Scenes in 'Avengers: Age of Ultron'

Avengers: Age of Ultron - Even Thor Can't Fight Ultron - IGN

Who Is on the Avengers Team After Age of Ultron?

Rotten Tomatoes Is Wrong” About… Avengers: Age of Ultron

Avengers: Age of Ultron, reviewed by two Marvel newbies.

Could Thor from Infinity War have defeated Ultron by himself? - Quora

Avengers: Age of Ultron - Even Thor Can't Fight Ultron - IGN

Could Thor from Infinity War have defeated Ultron by himself? - Quora

Avengers: Endgame' Shows Another Hero Wield Thor's Hammer Mjolnir

Why Captain America Couldn't Lift Thor's Hammer in Avengers: Age of Ultron

Watch: MCU's Ultron Returns In Live-Action for First Time Since Avengers 2