http://apocalypse40k.blogspot.com/2014/12/end-times-for-40k.html
So that little bit in the 40k tabletop rulebook about the Golden Throne having a flaw in it is going to get expanded on. Sounds like they're going to get the band back together and have the Primarchs do something - but what?
Will Robiute "Mary Sue-est Sue Sue" Guilliman save the day and take the Emperor's place?
Will the most bland chapter of transhuman super soldiers continue to be the most boring?
Will any actually interesting space marine chapters get any screen time?
Will the Emperor be allowed to die? Can the Astronomicon keep running on just the burning souls of sacrificed psykers, or is the Emperor actually required to make the thing work?
Will any of the less Chaos-y traitor legions be revealed to be good guys?
Which Mary Sue characters will be killed off, and which will reach new heights of Mary Sue-edness?
I have it on no authority whatsoever that the Emperor has actually been dead for a long time and the whole business on Terra is just keeping up appearances to keep the Imperium from splintering into a thousand city-state sectors.