Alright, let's get the speculation train going.
What does everyone think the new season will cover? We do know that Arbiter and Chief will encounter some version of the afterlife, but what will happen next? Will they warp into new bodies? If so, how will they do that unless they go back in time to before "Ignition"? If that won't happen, how will Jon's character figure into the plot?
So many damn variables. That doesn't even cover the villain, who I personally think will be Adam. Duncan possibly as well, since he got picked off WAY too easily and WAY too early. Either he's joining Adam or he's going to be a factor in the conflict, because his character had potential. Adam on the other hand is the villain, and I will bet money on that. He's a vile character, one that we've seen before, etc.