Reason one, it's from the 80's, and we all know the goldmine that is 80's film for riffing. The 80's film era pretty much almost satires itself.
Reason two, its british, and beloved by many a git on the ol' isle (i jest)
It's Narnia, though a version most americans arent even aware of, so they will both get something fresh to watch, AND a beautifully comical commentary by you fine fellows. A joy no doubt.
Heres a link the the show it all its 3 hours on the youtubes.
https://www.youtube.com/watch?v=6Fft9DLIp7E