i centrainly dont believe Daryl will abandon Beth, but this group he encountered was pretty 'badass' so he problably doesnt have much of a choice then to go along with them.. im just very curious about his next move!

will they all be reunited in Terminus?
i dont know, one 1 hand i just dont believe there will be a new 'prison' (or woodburry).
perhaps Terminus is not what it seems to be. but i guess we will see that at the very end of season 4 :l