User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-130.18.122.66-20120906204635/@comment-1038387-20120906211557

They're not that BA. They're more or less slaves of the central command, Jaime's just got a rogue scarab. They all have the same powers, but if you were to get one (hypothetically), you'd probably end up as a redshirt warrior. Plus, Green Lanterns and Darkstars (and probably L.E.G.I.O.N. too) hate your guts by default.

The Reach are still relatively new to the DC Universe. If you want Recommended Reading, you could try the new series, though it hasn't really touched upon the Reach since #5. In the previous series, the Reach invasion was covered in issues #12-14 and #22-25, and then some more in #35-36. The main invasion was #22-#25, the trade paperback "Blue Beetle: Endgame" covers that (pity it also contains three wholly unrelated stories that aren't bad, but clutter).