[spoiler]I am actually wondering if the show might throw us off. Instead of killing Glenn off, kill Maggie off. There were a few hints to support that through the episode. All the bruising she had when they were in the shower. Then there was that scene where you see Maggie behind the bars of Alexandria as Glen drove off. And then when she cut her hair she was talking about 'starting again' that's never good in TWD

But then.... I could be completely wrong. Just an idea.
How she is killed, i do wonder if her baby has passed away and might be a walker which is now eating her from the inside (grim I know!) But she looked like she was in absolute agony there. Hmm...
I too think it's the end of the line for Morgan. Carol however I'm not too sure. I think she's suffering with a nervous breakdown myself. I can pretty much guarantee that next week's episode is going to leave us all yelling abuse and with a horrible cliff hanger.
Daryl is fine I think.[/spoiler]