It would make a really great story but 40k is much to cemented to throw something in like that. That's just cheap writing to get attention. There'd be little point in such a thing.
Destroyed, yes, but why and by whom? No records exist so GW may be able to write lore on the fallen legion. Did the Emperor save the gene seed? Yes, Greg Knights were not formed until later, but that does not explain away that their geen seed may not be from a missing Primarch. Anywhere I have looked for this information has been vague at best, which seems to be by design.
Vaults of Terra suggested that GK gene seed probably came directly from the emperor as there was no primarch gene seed available due to all of that heresy stuff that was going on at the time.
Sorry but it seems the topic of gender is to sensitive of a subject for some. This thread is being locked while I clean it up. After it is re-opened, if there seems to be more issues arising from this thread it will be perminatly locked. Please keep it on topic to the Warhammer 40k universe.
If any Earth-like references are made to compare our cultures to that of warhammer 40k this thread will be locked. There are to many different opinions out there on this type of topic for this not to spiral into a flame war. Please keep it civil and on topic. Thank you.
Theres not much to talk about really, unless they add new factions (IG, SoBs and their chaos counterparts) The only faction with a gender option would be the eldar. Of course if the devs actually decide to invest time on it, which may be unlikely.