The Ultimate Marvel universe is a harsh landscape where even powerful gods face the possibility of death. The Ultimates served as a remodeled version of Earth-616's Avengers as their universe evolved into a thriving world of characters with very different fates from their mainstream counterparts. Apart from Miles Morales, the only original survivor of the Ultimate Universe is the Maker, who has now manipulated events to create a world of his design. However, a newly formed team of Ultimate Avengers has come together to right the wrongs of their universe.
Source:https://www.cbr.com/ultimate-avengers-casualty-possibilities-marvel/