at first (in the teaser trailer) i thought maybe he was talking to Semira (maybe they had teamed up to end Selene) but i'm not sure. i wonder if he's talking to one of the big/main characters or if it's just one of his fellow anyone lycans.
shareMy guess is Semira or Gregor. Gregor seems to be a prominent lycan: he's named in the credits, and is one of the champions in the new collectible card game.
It's hard to tell who Semira is cooperating with. She seems to be in league with the vampire council at first, and overthrows them later. Maybe she teams up with Marius at some point, but I would guess that she betrays him and tries to seize power for herself after that.
Semira was my guess, as well. The wraith-like people don't seem likely candidates, I don't think David's father would do anything to risk losing David again, so I would guess Semira. Be interesting to see what all we got right in guessing, when the movie comes out!
"There is still hope." - Arwen