Based on the names? I'm thinking that they might line up with these characters:
SW E7 BL SIDEKICK BATTLER BLUE - Chewbacca from Starkiller Base. Yes, an OT version of Chewbacca already got made in wave 1, but this version will probably be more in line with Chewie's appearance from TFA. And I suspect that he'll come with a satchel and some charges from the sapper mission with Han Solo. The "SIDEKICK" name really seems to lend itself to Chewbacca. Who else really has that kind of role, after all? And we saw the "BLUE" designation previously assigned to the TRU exclusive Snowtrooper Commander when it was listed as a BLUE TROOPER. By my estimation, that BLUE tag probably means Starkiller Base.
SW E7 BL SECONDARY HERO FIGHTER - Here, I'm thinking TFA Han Solo. The SECONDARY tag is a little offputting since a lot of people see this film as belonging to Han Solo, but really he is secondary in that this is the story of Rey, Finn and Poe stepping forward for this part of the saga. And Han serves as a guide to Rey and Finn.
SW E7 BL VILLAIN TROOPER COMMANDER - This is probably the most transparent listing of all. I think it's pretty obvious that this will be Captain Phasma. She seems much more likely to be listed like this than say, General Hux.