Marvel and Malibu team up as a result of some Loki meddling. I’m just going to admit that I never read this one. I don’t have it, and I don’t care to track it down.
The Ultraverse was what Marvel called its imprint line of Malibu Comics, after it bought them up–believing their characters might be worth reading about.
They weren’t. I’m not grading them because I didn’t read them. Just noting them here for completeness.
It started with Avengers/Ultraforce. Then came titles including Prime vs. Hulk, Nightman vs. Wolverine, and Exiles vs X-Men.
These were technically alternate reality stories taking place in an Ultraverse that melded Malibu with Marvel Universe.
Whatever.