You can read more about it here at Cartoon Brew (one of the commenters even delivers some info on what's going on and translations and such), but it's a Japanese cartoon from 1934 that takes place two years in the future where a bunch of happy-go-lucky critters on an island find themselves under assault by a legion of Mickey Mouse doombots riding evil bats, plus panzer divisions of giant snakes. Classic Japanese heroes come to the rescue.

No, really. Watch for yourself.

Direct link for the feedreaders.