I was wondering who the other escapee was. I was fluctuating between Barty Jr and Bellatrix. Can I assume that she's been possessed by her master? It sounds like it to me. I also suspect that she'll at least try to become the new History of Magic teacher. I'm curious about her animagus form, but I'm sure you'll reveal it in your own time.
I love that Neville won the contest. I was guessing Hermione, but he makes more sense.