Soon after Dark Eldar the Endtimes Book 2 with Archaon is expected to be released, and very soon afterwards we are looking at a what could be a big release for Blood Angels.
It seems that Games Workshop may be capitalizing on the Blood Angel release to replace older space marine sets. I had heard something like this in casual conversation a couple weeks ago, but it wasnt enough to really post up on. So with at least two people saying this, there is some momentum behind this rumor for some new space marine set replacements coming.
Please remember that these are rumors.
via Steve the Warboss
-The Sons of Sanguinius will come soon after Endtimes Book 2.
-GW will use this release slot to replace older Space Marine Plastic sprues.
-4-5 week are realistic.