And in Annihilation, fans get the opposite end of that proverbial coin, as Thanos allies himself with Annihilus. This is a truly epic display of both Thanos' engineering brilliance and ruthless ...

Bored Thanos later chose to side with a universe-threatening force during the Annihilation arc of comics. He later revealed that he threw his lot in with Annihilus and the Annihilation Wave ...