Reivers are up for pre-orders now for Space Wolves, Dark Angels, Blood Angels and Deathwatch armies. There is a quick guide that shows the points value for them, as well as some equipment options.
PDF guide for Reivers
via Warhammer 40,000 Facebook
Descend from the heavens with sanguine fury, strike fear into the hearts of traitors and stalk your foes across the tundra - Reivers can now be added to your non-Codex Space Marines. Like the Primaris Captain and Primaris Librarian, you can bring these terror troops to your Space Wolves, Dark Angels, Blood Angels and Deathwatch armies with our handy PDF guide, including matched play points.