(I'll start posting parts of the lore I created for the AU, in this post I will cover the founding members of the Avengers, enjoy :D)
The Avengers; earth's mightiest heroes
Freminet (or Nathaniel Richards), Iron Man
Directly from the 30th century, after surviving an assassination attempt orchestrated by his future adult self, inspired by fairy tales, the Arthurian Chronicles and the heroism of superheroes of the past, such as Captain America and the Fantastic Four, Freminet comes to the 21st century to forge his own path of heroism donning the Iron Man armor, along with his AI assistant, Qingyi and founding his high-tech company, Stark International.
Chiori, the Wasp; Giant; Yellow Jacket
Fashion designer, scientist, superhero. Chiori has assumed many mantles, but that of Wasp is the one she is most famous for; thanks to Pym particles, she can both grow and shrink in size. A former S.H.I.E.L.D. scientist, she left the organization after disagreements with her superiors, forging a new path as a founding member of the Avengers. But her biggest mistake lies in creating something that should be used for peace.
Thor
Dreams involving Norse gods, thunder, and the end of the world cause Evelyn to question her own existence. Is she a goddess? Or a reincarnation of something greater? Upon finding a mysterious hammer, she sets out in search of answers, encountering people like herself, especially one—a trickster.
Beidou, She-Hulk
Beidou was an ordinary lawyer before the car accident, in urgent need of a blood transfusion. The only compatible donor was her cousin, hunted by the army, the green creature known as Hulk. Because of this, the donated blood from her cousin allows Beidou to transform as well, alternating between her human form, her She-Hulk form, and a wild, angry form.