Hi there Ambro!
I see no one has responded yet, to your thread at least, so I'll take up the mantle and respond with what I know at least to give you an idea if you are still wondering.
SG is Horde on Bleeing Hollow, a PvP server, so I doubt to see them go play pansy Alliance characters anytime soon (no offense intended since all of my main characters are Alliance on a PvE server :lol: ) But either way I'm sure there are a lot of people that may be playing WoW but not with SG that are still in SG that may reach out to you.
As far as BF1 goes, I know there are a few people interested at the moment and I'm sure closer to launch we may get more. I personally am greatly looking forward to it and hoping to get a regular squad or two going if possible to spend as much time on the battlefield (no pun intended) building teamwork and strategy to dominate.
Hope that answers your questions!