At the end of the fight, Viktor puts Michael in a chokehold and comes close to killing Michael, but Selene interferes to save Michael by using Viktor's sword to slice his head in half, killing him.

Why is Michael not in Underworld Awakening?

While Michael does briefly appear in Underworld: Awakening, he's not played by Scott Speedman. Series creator Len Wiseman later explained that after focusing on the Selene/Michael dynamic in the first two movies, part 4 was intended to revolve around Selene and her daughter.

Did Marius kill Michael?

Marius and the Packs leaders Following the deaths of Jacob and Quint Lane, Marius, managed to rise to power as the leader of a massive Lycan army. He also captured Michael Corvin following his escape from Antigen, seemingly murdered him and drained his blood.