I think it's important to note that you can also hear the sound of probe droids in the opening shot when Boyega pops up.
Personally, I don't want this film to turn out to be another Sith vs Jedi. We already got that with the PT. I know the teaser don't display this (after all, they didn't show any Jedi), but the character in the forest is making me wonder since that guy is most likely a Sith.