It will definately cater to the veterans, just as the Horus Heresy does.
GW are not very innovative and their best ideas usually comes from the much earlier days of 40k.
Without William King's short story "The Siege of Terra", we wouldn't have anything resembling the Horus Heresy today.
But that old story is still one of the best pieces of fluff in 40k, and the question is wether GW have another cash-cow of that magnitude they can expand upon (I like the idea with The Scouring or The Age of Apostasy - bet on it that it will be set in the past!
Last edited by Engindeer; 02-07-11 at 12:14 PM.