Awkward Sloth
Lamest Harley, still better sloth than Jer
Going by the second story reveal trailer you can somewhat assume that Brainiac is the big bad when Batman is talking to the still caged superman. And Supes says something like "This is MY fight Bruce ". Cause the Brainiac destroying krypton yada yada backstory Brainiac comes to earth. Supes claiming it as HIS fight like he has more stake in it makes sense more when it's about Brainiac than the Society.It's NRS, they always keep it close to the vest. I'm just assuming this Supergirl trailer is finally going to bring in the whole Braniac angle, cause right now it looks like the primary bad guy is either Grodd or Wonder Woman if you go by trailers alone.
I think Darkseid's gonna be on Goro (non-canon) duty this time around. Either that or Cyborg would have a bigger part since he's the one with an Apokalyps cameo in his super.
I'd bet the society's part in the game is more like the Mileena/Kotal conflict in mkx where it's something to bring the forces of justice together and then something bigger/scary comes along (Brainiac).