We have been getting information slowly on what is coming in the Shadow War Box sets. Here is a little insight to the factions that will be available for the Astra Militarum, Orks, and Adeptus Astartes
A huge thanks for sending this in.
via sources on Faeit 212
The rules for Orks, Space Marine Scouts, and Astra Militarum Veterans are in there, but what you may not have heard is that there are multiple chapters, clans, and Imperial guard homeworlds represented.
The different sub factions have different skill tables when advancing in a campaign but are otherwise same (except of course Space Wolves.)
The Astra Militarum factions are: Cadian, Catachan, and Steel Legion (the home team.) The Ork clans are all of them, even Snake Bite. The Space Marine chapters are a lot, don't remember them all, but not all were first founding, for example, I think one was Sons of Guilliman. Space Wolves have different kill team rules because their Scouts are not newbies.