Odin was the All-Father, the leader of the Asgardian gods.
In his effort to finally defeat the Avengers Academy, A.I.M.'s Scientist Supreme set up a villainous coalition between A.I.M. , Hydra, now led by it's new leader Arnim Zola, and Attuma's Undersea University.
With a giant tidal wave, the villains submerged the Academy, and captured the Academy's faculty to leave the students disoriented.
The students were able to free Odin, and with his help, fight back against the villains, and the free the other faculty members.
The Power Cosmic: Wearing his Cosmic Suit, Odin is able to access the Power Cosmic.
- Even though Odin was in the game from the start he only became playable in March 2017 as part of the Legends Assemble event.