I'm kind of surprised there hasn't been a pastiche where one of Conan's offspring comes to usurp daddy.
Maybe one could be at the head of a mighty Stygian army, the son being the unholy offspring of Conan and a Stygian sorceress, who had her way with him through sorcery to birth a child of awesome physical power and terrible sorcerous energy. Conan is torn: he is his own flesh and blood, yet he is corrupted by his Stygian upbringing, forsaking Crom for Set?
That'd be really interesting, for a pastiche.
But as I said, I've talked to the folks, and no one is really biting on new Conan books...with him in them anyways.
If this isn't so, lemme know.