lol, I just imagined the Wizards from the Unseen University attending the Triwizard Tournament at Hogwarts. xD I think that would be totally hilarious. Or what about a Triwizard Tournament on the Discworld? Wizards vs. Witches vs. Who-ever-wants-to-participate-i-dont-know Just think of all the possibilities of this crossover!
Also I love this idea! (that school would be totally weird though... when can we go there? ) and thanks for the inspirational kick, I have never been into any cross over fandoms, but i love this one.