Cartoon Brew blog has a clip of what the adaptation of Windsor McCay's comic strip Little Nemo could have been like...
Here's the test sequence, animated by the legend of anime Hayao Miyazaki and directed by Yoshifumi Kondo: http://www.cartoonbrew.com/anime/little-nemo-test-film [embedded YouTube] | Longer version at Google Video - Thanks John "Widgett" Robinson!
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http://video.google.de/videoplay?docid=8022177419505188868&q=miyazaki+on+your+mark&total=51&start=0&num=10&so=0&type=search&plindex=9
A nemo film was released about this time 86 or 87 and it was below standard, kind of a kids matinee film. That may have killed this film. But what a shame.
I feel blessed to have seen this little piece of it.. Thank you.
http://en.wikipedia.org/wiki/Little_Nemo:_Adventures_in_Slumberland