From bell of lost souls:
Hi all,
As usual, you faithful scribe is here to deliver what little rumor morsels we've scraped up from around the tubes.
The current rumors say there will be 9 special characters. So far these 8 have been mentioned:
Calgar -Ultramarines Master
Tigurius - Ultramarines Chief Librarian
Cassius - Ultramarines Master Of Sanctity
Sicarius - Ultramarines Captain
Shrike - Raven Guard Captain
Lysander - Imperial Fists 1st Captain
Pedro Kantor - Crimson Fists Master
Tu'Shan - Salamanders Master
We also have heard talk that the Land Raider will be rolled into an updated all plastic kit that will allow you to build all the basic variants in the codex (Standard, Crusader, Redeemer).
~I hope the rumored Redeemer's inferno cannons look like the Forgeworld siege dreadnought arm... that would be wicked!
There is also scuttlebutt regarding a re-cut of the maddening Land Speeder that might be easier to construct and some chatter regarding new scout bikers.
~As usual folks, caveat emptor, and if these don't pan out, you didn't hear these rumors from me 
I for one would be ecstatic to see the Salamander's get some love. Now what about those Iron Hands and White Scars GW? Haven't they been loyal for 10,000 years?