Board Thread:Warhammer 40k General Discussion/@comment-6078851-20130318203252/@comment-7186329-20130319201604

We do not know what happened to the souls of the `dead` primarchs, even if they are still somewhere in the Warp. To have a reincarnation, you need the soul to be placed in a body. Even if the souls of the primarchs are somehow still intact, giving them the same body would be a problem.

It could be possible that there could be a physical manifestation of a primarchs soul in realspace. Because of the Sanguinor it is apparent ,that not all things in Warhammer stay dead. If we find out what the Sanguinor is, then probable speculation about reincarnation of the primarchs can be started. Otherwise, i reincarnation is off the table.