This page details pre-release information and/or media for The Revenge of Shinobi (Genesis).
Original Final Boss#
According to chief designer Naohiro Warama, Joe Musashi's master (the old man dying in the game's intro) was planned to be the head of Neo Zeed and the game's true final boss. In addition to his martial arts skills, he would also have been able to summon earthquakes and falling rocks.
The entire battle was sequenced and designed, but due to time constraints it never made it into the final release.
(Source: sega-16.com)