Board Thread:General Discussion/@comment-34924658-20151030194635/@comment-1894786-20151102022542

The Greek Underworld did not only house the evil souls, it's home to all of the dead.

So while Cora is confirmed to return at least once, so could ANYONE else. Huntsman, Anita, Peter, Priscilla, Lizard, Amara, Neal, Ingrid, Cruella, Peter Pan, Felix, Henry Sr., Daniel... Literally anyone who's died in this franchise is able to come back.