I'm almost certain, that at 1 point they said random bg in the ptr patch notes. However, I tried to queue up last night with a raid of 6 guildies (no real ID) and it wasn't possible. Basically we could queue up, but we got a warning our group comp wasn't correct so we were not going to be able to join it; which seems a rather dodgy warning. Might be bugged, we will see.