I am pretty sure this will be the more recent version of Secret Wars, not the original.
Secret Wars (2015)[edit]
Main article: Secret Wars (2015 comic book)
In May 2015, Marvel published a new Secret Wars miniseries, written by Jonathan Hickman and drawn by Esad Ribić, that picked up from where the "Time Runs Out" storyline running in Avengers and New Avengers at the time had ended.[29] The storyline involved the Marvel Universe combining with other alternate universes, including the Ultimate Universe, as well as the 2099 Universe, to form Battleworld, a world which exhibits aspects of the various universes. The core limited series was nine issues long, and ran for eight months, ending in January 2016.[30][31][32] One of the core miniseries, Ultimate End, had ended the Ultimate Marvel imprint after 15 years at the time. Ultimate End is written by Brian Michael Bendis and artist Mark Bagley, the team that began the Ultimate Marvel universe with Ultimate Spider-Man.[33]
This story fits very much with the Multiverse Saga
I'm not familiar with this one. Long past my time in comics, but I'll see if I can find it and check it out.