The evil AI known as Ultron is one of the Avengers' most powerful and dangerous foes, with a murderous drive to replace all organic life on Earth with robots and androids like him and the raw power to challenge the entire team of Earth's Mightiest Heroes.
An MCU theory suggests that Ultron could be revived from the information inside the Vision's body. Ultron could return to the MCU in Ironheart, Armor Wars or the upcoming Vision Quest series.
Just as Thor or his Rune King version can easily defeat Ultron, Shazam (Billy Batson) shouldn't have any problem doing the same. Shazam's powers are magical and something Ultron might have difficulty processing.
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Can Infinity Ultron beat Thor?
Lets answer this from a MCU point of view, since the comics isn't that consistent in their portrayal of characters while MCU is more or less consistent in their character development thus far. Thor is definitely stronger/more powerful than Ultron.
Ultron's non-stop assessments for peace quickly led him to deem the entire human race as unstable and prone to self-destruction. He subsequently chose mass genocide as the solution to the error, with the Avengers being the obstacle standing in his way.
Ultron sees the Avengers as one of the main problems with the world's stunted evolution. He particularly dislikes his maker Tony Stark and flies into a rage when compared to him. The evil A.I. has a particular dislike for Vision who inhabits the powerful body Ultron had built for himself.
After a fierce battle against the Guardians, Ultron was defeated after he was overwritten and purged from his body by Arnim Zola, ending his multiversal rampage.
In 2015, J.A.R.V.I.S. is seemingly destroyed by Ultron, but he was able to save himself by distributing his "consciousness" throughout the Internet, allowing his security protocols to delay Ultron's attempt to access Earth's nuclear launch codes long enough for Stark to work out what had happened.
If neither had any Infinity Stones available, Thanos would most likely win a fight against Ultron fairly easily, but since Ultron was "born" using the Mind Stone, there would have been no instance where the two could have met in the standard MCU where Ultron didn't possess it.
The Hulk disappeared at the end of Avengers: Age of Ultron in a quinjet, not wanting to be a danger to anyone else or be used as a weapon. He willingly blasted off into space, and, given the large number of wormholes that led to Sakaar, his ship eventually landed on the Grandmaster's planet.
"Tony Stark's story is far from over," Downey said. "Iron Man 4 will explore new dimensions of the character and his legacy through the eyes of Morgan.
Ultron Mark-12 debuted in Vision and Scarlet Witch #1 in 1985 as a villain, but over time came to reconsider his actions, and decided to become a good guy. Created by Steve Englehart and Richard Howell, his heroic career did not last long, and this version has been all but forgotten.
"Hello, I am J.A.R.V.I.S.. You are Ultron, a global peace-keeping initiative designed by Mr. Stark. Our sentience integration trials have been unsuccessful so I'm not certain what triggered your..."
Having Spider-Man join the new Avengers team in Avengers: Age of Ultron would have ruined his actual debut in Captain America: Civil War, as he would have already been an established member of the MCU's superhero world.
The pair went head to head in Avengers: Infinity War and Avengers: Endgame, but it has been pretty clear from all the way back in the first Avengers movie that Thanos was the Stark's embodiment of fear.
Moments before Vision destroyed him, Vision pointed out that Ultron was afraid of death, to which Ultron didn't even bother to deny as he admitted that he was afraid of Vision despite standing up to him.
A machine can pick up the weapon and move it anywhere since it's mindless and incapable of possessing the morals necessary to be considered worthy. By this logic, Ultron himself could have lifted it, but it wouldn't have done him much good.
This is a huge and humiliating end for the Asgardian trickster, and proves that as powerful as Loki is, even he cannot resist the technological terror of Ultron.
A fight with Hulk alone feasibly could have made for a climactic battle, but it didn't because Hulk is no match for Ultron. That's likely why he's taken out so early on in the story, before the events of the first issue. Readers aren't even made privy to the exact circumstances of Bruce's death.
