I agree with Golurk that Glenn is going to stay mad at the governor along with everyone else because of all he has done. There is no way that the two sides will ever have a compromise it is going to come down to who can kill each other first. As for Merle I don't really like him, but I feel that there is still a chance he could redeem himself to the point where the others accept him. Michonne and Glenn will take more time to get used to him, but I feel he can be helpful and that they will realize they need him. I actually think that Rick will continue to be leader for a while longer especially if he can come to his senses and stop with these crazy visions. He still even in his state has a chance to redeem himself and step back up to being the leader that he originally was.
Any zombie death that was caused my Michonne is a cool death :D