Appearing in "Thanos' Grandfather"
- Druig (Main story and flashback)
- Sui-San (Mentioned)
- Death (Mentioned)
- Uni-Mind (Name only)
- Uranos Dynasty (Main story and flashback)
- Kronos Dynasty (Only in flashback)
- Uranos' Clone (Mentioned)
- Phastos (Mentioned)
Races and Species:
- Eternals (Main story and flashback)
- Celestials (Mentioned)
- Deviants (Only in flashback)
- The Horde (Mentioned)
- Solar System (Main story and flashback)
Synopsis for "Thanos' Grandfather"
- Synopsis not yet written
Thanos is now ruler of the Eternals! But believe it or not… he's actually not the worst leader that the Eternals' society has ever seen. No, that honor belongs to someone even more horrific. Thanos is evil, yes, but who was the original evil from whom all Eternal evils descend? Meet Uranos, the Undying. And may the Celestials have mercy on your souls.
- This one-shot was originally solicited with the subtitled "The Undying."