I'm kind of hoping that somehow Andrea gets mixed in the fight between Daryl and Merle, and ends up dying. (I never liked her.) Then Daryl and Merle team up and go after the Governor. (Yeah, like THAT would ever happen.) One can dream. gonk
Daryl has stepped up to the plate to help out A LOT when Rick was having his emotional breakdown. Daryl wouldn't be the best leader, but he'd still take care of the group. Especially Carol. :v And baby Judith.
Daryl is not leader material, he's more of an independent person who would probably do so much better on his own. But his big heart stepped in and he knows the group needs him (not the other way around) and wouldn't betray them.
Andrea will definitely make the right choice. She wanted to stay because it seemed safe, the governer liked her, and she was away from her group. Now seeing her group, seeing that Michonne has came back for something important, she'll do the right thing.
I wouldn't be surprised if she flip-flopped between the groups and ended up betraying Rick's group in the end for the Governor. She's not the brightest and she's certainly selfish enough. D:
It was hinted either in one of the previews or in The Talking Dead that someone betrays Rick. I think that person, if it's only one person, is Andrea. She's seen in the previews standing outside the prison fence with a walker, so it's not impossible.