Board Thread:News and Announcements/@comment-24386552-20140807000959/@comment-4287993-20140809125641

I somewhere read that Kate Burton was returning to the series for a "flashback or two", so I don't think the entire premiere will be about Maggie and Ellis.

I wouldn't be surprised if Maggie becomes a regular somewhere mid-season. Shonda was asked about this and she said Kelly McCreary was only a guest star for now, but that might change in the future.