* He doesn't truly die: Leto II, having absorbed the sandworm and becoming a hybrid being, achieves a form of immortality. He exists as a vast consciousness spread across the universe, a being of pure awareness.
* He sacrifices his physical form: After thousands of years of ruling as the God Emperor, Leto II decides to end his physical form. He allows himself to be consumed by a sandworm, knowing this will break the cycle of dependence on spice and force humanity to evolve.
* The death is symbolic: Leto's death is a deliberate act of sacrifice, an attempt to break the cycle of violence and control that he himself had created. It also serves as a way for humanity to reclaim their agency and freedom.
* He continues to exist: Even after his physical form is destroyed, Leto's consciousness continues to exist, guiding and influencing humanity from beyond. He becomes a guiding force, a "presence" rather than a physical entity.
Essentially, Leto II's "death" is not a traditional ending. It's a transformation, a shedding of his physical form to allow humanity to forge its own path.