Board Thread:Spoilers!/@comment-5094906-20150509210749/@comment-5899967-20150509214109

Okay, I'm gonna break my pause from the forum to say this: the tweet/picture listed on this site that mentions Maleficent in Operation Mongoose Part 1... well, it's actually taken from Mother, it was around the same days Barbara Hershey was shooting, and in the picture, you can clearly see Maleficent, Charming and Snow with their car, just like in Mother.

So the only confirmation we have of Maleficent in the finale is the extended synopsis.