Board Thread:Warhammer 40k General Discussion/@comment-69.143.134.163-20150419161351/@comment-78.133.88.65-20160419205648

It's just officially sanctioned art though. Sadly the meaning isn't clear. It could mean several things ranging between those ARE the skulls of the missing Primarchs as a warning/rememberance to they ARE NOT the skulls and they are reminders...and several other options between.

Don't think it should be ignored though it loses value dye to lack of more information. What is safe (ish) to say is that they were remembered. But at this point we can't we've say that those skulls are the means at which that is done. Might just be a coincidence.