In God Emperor of Dune by Frank Herbert, Leto states that when his 'metamorphosis' into a sandworm is complete, he will return to the sand. He goes on to say that the sandworms that would come from his metamorphosis would posses qualities from both him and the sandworm.
- The sandworms would have at least a pseudo-brain. Derived from Leto's body, which was fused with that of the sandtrout.
- Parts of his consciousness would live within each individual sandworm.
Although Leto was absorbed into the pre-sandworm body, he and the worm are not the same a. being, b. species (by extension).
It seems extremely unlikely that the next wave, for lack of a better term, of sandworms, would have the brain tissue that was introduced by Leto, much less the circulatory and respiratory systems to support it.
Why would Leto's sandworm 'offspring', have characteristics of himself, when in reality, he was merely a parasite in the worms body?