Board Thread:Warhammer 40k General Discussion/@comment-24332685-20140111015135/@comment-24332685-20140113154014

I think that is how they would do it. Like the Horus Heresy books initially started out with just horus but then they expanded to encompass just about every Primarch. I think that is what they could do for the return series. Start out with whoever is the first to return or awaken and then basically expand it to each of the primarchs that either returns, is found, or awakens.