Board Thread:Spoilers!/@comment-26159109-20160301190120/@comment-24674051-20160511032044

Actually, the actresses that portrayed Elsa in the S3 finale and the Actress that portrayed Mulan in the S2 Finale were never credited as far as I am aware. the Role of Elsa was not actually cast until about a month or so after s3 ended.

Also, reading the press release, it says specifically that "Guest Stars include". the list provided is not necessarily a complete list. Don't get your hopes up, but don't lose hope either. you never know what might happen.