Deniz Camp, writer of Ultimates, states that the Marvel's Ultimate Universe was intended to continue, but the creative teams behind Black Panther, Spider-Man, and X-Men had planned to exit their respective books after The Maker's return in Endgame.
According to Camp, Earth-6160 was not meant to meet a quick end, but the teams behind the aforementioned titles had always intended to leave their books following the upcoming Endgame event.
the Black Panther, Spider-Man, and X-Men creative teams always planned to exit their respective books following The Maker’s upcoming Endgame return
The end of the Ultimate universe was first announced at New York Comic Con 2025, with the publisher declaring that "The Ultimate universe comes to an end" in April 2025, coinciding with the release of Ultimate Endgame Vol.
Author's summary: Ultimates writer clarifies Ultimate Universe's end plans.