Board Thread:General Discussion/@comment-25926288-20151207015752/@comment-8345449-20151209004803

Zelena doesn't seem to have too much trouble crossing worlds with magic, considering she travelled to EF in Season 4 and she somehow transported Glinda from Oz to EF with just a wave of her hand. Perhaps portal-jumping to Storybrooke may be a bit more difficult considering it is smack in the middle of TLWM, but it is probably just a matter of time before she finds a way.

I am not sure why you think banishing Zelena to Oz is such a bad thing considering the circumstances. With the DO crisis, they didn't have a lot of time left to explore other options. And Zelena was previously gloating over Robin and Regina's impending deaths (even after they tried to make peace with her) and said she would bring up her daughter to be "wicked". Do you really think she would make a good mother?