Just found This, be warned it has Episode synopsis up to episode 9 it also talks a little about time passage, it's been 6-7 months since season 3's end.
After reading that link, this is my guess about episode 9.
Not saying that story won't happen but I'm kinda thinking episode 8 will be the return of the Governor and at the end with the tank driving up to the prison for the mid season finale and Episode 9 will be the conclusion and sadly they way it plays out in the comic.
Given how that site describes it being a big episode for Carl, I think Episode 8 will be the destruction of the prison, and the cliff hanger will be Rick and Carl escaping alone. Leaving the viewer to wonder about the fate of other characters.
The second half of the season will begin the journey to Alexandria storyline.
The second half of the season will begin the journey to Alexandria storyline.