There is a new rumor floating around that these are in the works, and that a codex: Catachan is coming. This would most likely bring in Marbo, and some special rules for the Catachan army, perhaps some infiltration and more.
Please remember that this is a rumor. Salt is always required.
via StrykerSniper on Warseer
Astra Militarum Heroes Return!
So, those of you who have purchased the new Codex: Astra Militarum will notice the loss of most of the old imperial guard officers, especially those without models, but some like al'Rahem, Chenkov, and even Marbo.
Well, I've been told by a pretty darn reliable birdy that some supplements are in the works. I am not sure which ones will return, but I have been informed that something along the lines of codex: catachans is in the works.
The big releases with these supplements is merely a rerelease of temporarily discontinued characters, but no new boxed sets. Oh, and aside from remaining legal due to forgeworld, don't look for a Medusa or bombard, not gonna happen.