I'm not sure there's quite as much to cram into this as you are thinking; most of the little mysteries throughout the show have been explained already. What we don't know is Lady Trieu's plan, what happened to Looking Glass (I could see that being left unexplained), how Ozymandias gets back to Earth, and who that lube guy was. In terms of narrative, all the main plots are set to collide with each other except Ozymandias as we have no idea how he fits into any of it. I think it's worth noting that last episode nicely let us know how Ozymandias' timeline fit into the rest of the world, and while we have zero clue what the horseshoe is all about and how it will grant him escape, we know that he was given it 3 years prior to the current events. It's quite possible that he's been manipulating this whole thing considering that the police massacre ALSO happened 3 years ago. At any rate, I'm not sure what is going to happen, but I feel fairly good about resolving it all in an episode as long as the last one was though I'd love a longer one too.