Or will it be a new villain to keep with the villain theme? What collections do we have that are missing a villain? There's Maleficent herself, but that seems unlikely as she is the villain of the entire game. In the last two tower challenges, it has been a character from the last collection featured during the event, so that would suggest a new Alice character-Tweedledee/dum maybe? I can't come up with any other major characters missing from that set. I'm really curious now who the new character will be.
I like this twist! Especially since the villains are the hardest/last characters during an event and more players are likely to be missing them even if they did play the original event.