Which map do you guys want to play Horde on? And what colors do you want to play? You can be different colors since it's PvE, but you can also play the same color since you're on the same team. So unlike PvP you aren't restricted at all for which color you want.
Sorry for the delay, I've been busy for the past few days with some behind-the-scenes balancing for this as well as some other stuff. I can't progress the matches until this is done though, I hope you all understand.
So i figured out (and fixed) the problem. Now all I need to do is go and recalculate the affected values across all characters, which I'm doing right now. I don't know when I'll be done but if I finish at a reasonable hour then I can get an update on both matches tonight. If not, then expect the updates first thing tomorrow morning/afternoon in EST.