So it does look like McAllister crashing through a window in the promo. The stills look pretty clear on that. I don't beleive we can guess RJ by anything in the promo tho.

Of out 7 suspects it seems Partridge and Kirkland are the most dead, Bertram and Reed were already teased as RJ in ep 7 and for my money thus ruled out as the big reveal in ep 8. Everything in ep 7 screams Bertram is not RJ. This means that one of the "dead" guys from the explosion would be RJ.

If the promo is showing McAllister, does that make him RJ? Maybe. If McAlister is not dead, then could Hafner and/or Stiles be alive? Is McAllister in the promo helping Jane? Who knows. I don't liek the coming back from the dead stuff, but of all of the dead people, the explosion scene has the most unanswered questions (What was the gun shot?). Did McAllister or Hafner cut off their hand in a sick maniacal way and leave it for DNA proofing?

That's where I'm at right now....