Now that you have seen the teaser, what does it all mean? Beats me as the Abrams cone of silence remains in full effect but the speculation remains. i09.com has an excellent breakdown with screenshots that at least lets you figure how who is who in some of the scenes since there are a lot of new characters. Probably like most fans the best part of Vader's destroyed helmet which somehow survived going down the chute of the Death Star along with Vader's saber being handed off to another (even though that saber was lost with Luke's hand in The Empire Strikes Back). Hopefully all these returned tidbits pay off and not in the "Superman Returns" homage overkill manner.
A few behind the scenes shots have also been released including the new trio of heroes which you can find here. More screenshots from the teaser is here.