Now That's a Crossover [LINK FIXED!]
Stanley Kubrick at one point considered incorporating the devil-looking Overlords from Arthur C. Clarke's Childhood's End into his movie, 2001: A Space Odyssey. You'll find that and a bunch of other gems in this web essay on the "Aliens That Almost Were."
Article printed from VodkaPundit: http://pjmedia.com/vodkapundit
URL to article: http://pjmedia.com/vodkapundit/2013/10/19/now-thats-a-crossover