While I loved the first 1/3, I can't, at this juncture, figure how they intend to wrap up this story in a satisfying fashion with two episodes to go. Perhaps the plan is to kill everyone on the show one by one and then, when everyone's dead, the show ends?
Thusly, the final episode will be Gravik killing all of the Graviks until there's none left except for himself...
But, in the post-credits sequence, Nick Fury emerges from the pile of Graviks, points his gun at final Gravik and says, "Now go the fuck to sleep." Smash cut to black.