Cool trailer. Closing the gates of Hell does sound like a very worthy season-long quest, though with Jeremy Carver's recent comments it wouldn't surprise me if it takes them more than one year (assuming they actually do it, that is).
I wonder how the Leviathans are going to figure into things now. Obviously there are still a lot of them out there, and I find it hard to believe that without Dick they're no longer a massive threat to humanity.