I would assume pricing on each engine option of the 9-2 to be maybe $2-3k more than its Impreza equivalent. I'm pretty sure pricing on the 9-3 and 9-5 overlaps depending on which engine you pick.

No, they haven't unveiled anything yet. There was a rumor about this floating around a long time ago, so they may just wait til the production car is totally done to show anything to the public.