Arc summary is here:
http://walkingdead.wikia.com/wiki/Vo...:_Too_Far_Gone
Most likely we can assume that next episode as the mid season finale, big battle ensues, nobody really wins but the main group leaves the prison. By the end of this season they find this new settlement, Alexandria, and all the fall out from the comics ensues here. Rick kills a few people if I remember right, I didn't read the whole thing. I am guessing on the road to this settlement is where they find Abraham.
If this is the case I am ok with that, we get a bit of them on the road, survival scenarios, Abraham and a new settlement with new politics. However, I wonder where they go from there.. the same thing I have wondered about the comics for a while now. I thought this virus thing would lead us somewhere in the show, but so far all it seems like is a way to cull the population to make the Governor's attack more realistic and intimidating.