When Ninja Scroll director Yoshiaki Kawajiri visited Sakura-Con, he told fans of the hit anime bloodbath that he planned a feature sequel and even produced a sizzle reel to attract investors. The feature was never funded or produced, but with the new Blu-ray of the original out in Japan (with English subtitles and audio), you can see the preview of the unfinished Ninja Scroll Burst.
UPDATE: convention name corrected.
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Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.