Avengers Forever by Jason Aaron Omnibus

Plot

Collecting: Avengers Forever (2021) 1-15, Avengers Forever Infinity Comic (2022) 1-4, Avengers Assemble Alpha (2022) 1, Avengers (2018) 63-66, Avengers Assemble Omega (2023) 1

On a quest for cosmic vengeance, Ghost Rider finds himself on a ruined Earth where the great Age of Heroes never came to be. His only ally is the world's most wanted archaeologist: Tony Stark, the Invincible Ant-Man! Together, they must find more surprising champions from other realities for the looming confrontation that will assemble the mightiest heroes of Earth, the Multiverse and 1,000,000 BC! They will unite on a day like any other to face a battle beyond all imaging. Because an army of unprecedented evil now rises — including Doom Supreme, his Multiversal Masters of Evil and a nigh-infinite army of Mephistos! But who is Avenger Prime?!