Half a season just to get to a repeat of the season 3 finale.
Surely don't expect a "run and hide" by the guv.. This will be a battle to the end... I haven't read past this part of the book so pure speculation on my part but...
I see "the end" being Rick and the survivors take off running with whatever they have available to them and the Guv and whoever survives from his group to take over the prison.
Then again, the guv and many of the attackers could die, but do enough damage to the fences and the walls of the prison to make Rick realize the Prison is no longer a safe haven..
This will bring back what has basically been left in the wind... the radio transmission.... and the group deciding to head out and find where the transmission came from.
lots of ways this could end.. but a mid-season cliff hanger is all but a guarantee.