When Earth-616 and the Multiverse was restored, and upon the recommendation of Monica Rambeau, America joined the Ultimates alongside Rambeau and the other members, T’Challa, AKA Black Panther, Carol Danvers, AKA Captain Marvel, and Dr. Adam Brashear, AKA Blue Marvel, fending off local and interdimensional threats. With the team, she faced the world-eater, Galan, AKA Galactus, and Conner Sims, AKA Anti-Man.
When the second Civil War began between superhumans, Captain Marvel wanted to use Inhuman Ulysses Cain, who could predict the future, to stop crime. When using one of his predictions to stop Thanos, it led to the death of James Rhodes, AKA War Machine, and left Jennifer Walters, AKA She-Hulk, mortally wounded. Taking the consequences to heart and after helping a being called the Infinaut, America opposed using Cain’s ability and most of the team agreed with her, leading to the team disbanding.
Although, America reformed the team to help Galactus and Anti-Man find the culprits who captured the cosmic being Eternity, which led to the defeat of Eternity’s jailer, the First Firmament, another cosmic entity. Afterward, the Ultimates were eventually absorbed into Alpha Flight.
America started college with Prodigy at Sotomayor University. In between her studies, she learned to travel back in time, and teamed up with her past self to fight an energy monster. She also met a luchador-looking old lady, who ended up being a woman named Madrimar from Planeta Fuertona. But America ended up chasing her old crush, Magdalena, who reached out for help. Teaming up with Kate Bishop, they met Magdalena in Nevada but she promptly stabbed America with a syringe. America ended up in a ring fighting to save Magdalena from the evil Midas Corporation.
She then found out that Madrimar was apparently her other-dimensional grandmother who left the Utopian Parallel to save Fuertona when America was born, a choice America has had trouble forgiving. With Madrimar, Chavez traveled through the Multiverse to the Ancestral Plane—the metaphysical manifestation of America’s people, the Fuertona. There, she witnessed her earliest personal foundations, her mothers, and her larger place in the universe.