A detail from Avengers: Endgame shows that Tony Stark is the only hero Kang the Conqueror fears.
One small but important detail in Avengers: Endgame suggests that Tony Stark/Iron Man is the only superhero that Kang the Conqueror is truly afraid of.
Phases 4, 5, and 6 of the Marvel Cinematic Universe relate to the multiverse and the consequences of time travel after the events of Avengers: Endgame. Kang, the Conqueror, replaces Thanos as the main villain. He’ll have to face a decent group of superheroes that will reunite in Avengers: The Kang Dynasty and six months later in Avengers: Secret Wars. But he’ll be glad he doesn’t have to fight Tony Stark/Iron Man.
But Kang’s influence on Marvel Cinematic Universe events seems to have been underestimated by heroes and villains alike, even in the first three stages. Loki explained it in episode 6. “I paved the road, you walked.” So the character, or at least the variant that says it, was aware of everything that happened to some of the greatest characters, including Tony Stark and his sacrifice at the end of Avengers: Endgame.
The latter not only solved the way to time travel, but was also clear about the dangers of doing so. “If you play with time, it will play with you,” he said in a scene from Avengers: Endgame.
Tony Stark seems to be the only superhero who can understand the benefits and problems of time travel, which is Kang the Conqueror’s main advantage. Therefore, it is especially convenient for the villain that he is no longer alive.
Kang’s fear of Tony Stark after the events of Avengers: Endgame
If Thanos’ strength lies in the immense power he gains while collecting the Infinity Stones, as demonstrated in Avengers: Infinity War and Avengers: Endgame, Kang’s lie lies in his ability to control time at will. He collected weapons from different eras to become stronger in comics and defeat superheroes. We don’t yet know how it will do that in the Marvel Cinematic Universe, but it’s likely similar.
And if there’s one person you don’t want to confront, it’s another genius who can figure out how to manipulate time. That was Tony Stark, and he showed it in Avengers: Endgame. Also, in the comics, Kang doesn’t have a superhero of his own. It all depends on his intelligence, his ability to invent as a genius and time travel.
These are all features similar to those of Tony Stark. The superhero who most resembles himself and therefore fears a confrontation the most. Many things can happen and another character emerges like Riri Williams who takes on some of Stark’s best traits. Or we could see a version of the character from a parallel universe. We only have to wait a few years to witness the events of Avengers: The Kang Destiny and Avengers: Secret Wars. Until that happens, we will continue to theorize about Kang’s motivations and fears.