This looks like it might be a lead in, or released at the same time as the rumored Horus Heresy game coming out next month. It fits the rumors we have been hearing for it, and a graphic novel released alongside it would be fantastic.
Please remember that this a rumor. I have no idea on how solid it is, so apply salt as required.
via anonymous sources on Faeit 212
There will be a Horus Heresy Comic revolving around a Space Station and
two Space Marine Legions fighting available available very, very soon...