Siegfried is killed by Hagen. Siegfried and Brunnhilda are escorted to Asgard by Valkyries. Odin returns them to life with no memory of their previous lives, and Siegfried now named Thor. Odin tries to kill himself until the appearance of the first Celestial spaceship causes him to want to live again.
Thor; Eye of Odin; Odin; Zeus (flashback); Celestials [Arishem] (flashback); Eternals [Ajax] (flashback); Vishnu (flashback); The Destroyer (origin); Heimdall; Sif; Mimir
The Eye of Odin finishes it's story, telling Thor of how Odin, Zeus and Vishnu confront the Celestials when they landed in the past, trying to drive them away. They were easily defeated. In the present Thor finds out that Odin has donned the Destroyer armor and gone to battle the Celestials.
Thor; Odin; Destroyer; Celestials [Hargen the Measurer; Tefral the Surveyor; Nezarr the Calculator; Gammenon the Gatherer; Arishem the Judge; Jemiah the Analyzer; Eson the Sercher; Oneg the Prober; Ziran the Tester]; Eternals [Uni-Mind]; Zeus (cameo); Vishnu (cameo); Mother Earth
Odin and Thor battle the Celestials. The Celestials pass judgement on the Earth. Thor learns the identity of his mother.