Board Thread:Questions and Answers/@comment-24977220-20140523222343/@comment-24882645-20140716223224

Considering that Margaret was on the show for four seasons, I'm pretty sure she will return at some point. I think the creators just wanted to come up with a suspenseful/innovative way to end the fourth season. I remember watching a comic con interview where one of the voice actors for the show said that "season four was going to end with a bang," and it certainly did, in my opinion. Completely eliminating Margaret's character would be pretty foolish, though, seeing as she was a major character in many episodes of RS.

As for her return, I agree that it will probably either be by the end of this season or somewhere near the beginning of season six. Instead of a fight breaking out between Mordecai's love interests, though, I think it would be much more appealing to see Margaret and CJ become friends, ultimately making it much harder for Mordecai to choose who he wants to be with. I'm 99% sure Margaret will return, but (hopefully) not in the way everybody thinks she will. The creators like to throw curveballs at us, it seems, so writing a predictable scenario doesn't deem to be something they would want to do in a situation like this. I'm not saying that a drama bomb won't explode at some point, though. Bringing back an old flame is sure to cause trouble for somebody, although it might not be who we'd expect.