In the Sword Art Online: Alicization novel, Kirito's dual-wielding ability is tied to his unique in-game skills and experiences. It's a result of his exceptional talent and training within the virtual world.
In comic books, Stormbreaker isn't something that anyone can pick up and use. It's reserved for those with exceptional strength, a pure heart, or a special destiny tied to its purpose.
The ending of the Sword God Realm was that in the process of saving the humans, Kirito and Asuna experienced many hardships. In the end, they overcame the difficulties and successfully saved the humans and returned to the real world.
Although they weren't together in real life, in the story of the novel, their feelings became deeper and deeper, and finally they relied on each other to spend a good time together.
The ending of the Sword God's Domain chapter was full of romance and warmth. The relationship between the Kirito and Asuna was also fully expressed.
Stark did have moments when he wielded the Infinity Gauntlet in the comics. It was usually in situations where his ingenuity and determination were crucial to saving the day or dealing with cosmic-level threats.
It really varies depending on the specific comic universe and storyline. Sometimes there's just one main character, but in some complex story arcs, there could be several.
Occasionally, Captain America does get the chance to wield Mjolnir. This usually happens in specific plot developments or alternate universes within the comics.