A remake of the game was released for the Super Famicom that was titled Metal Slader Glory: Director's Cut, which was released via the Nintendo Power downloadable service.
This game was also the final official Super Famicom release by Nintendo. After that, the Super Famicom was retired as a viable gaming platform. No company would ever release a game for Super Famicom after this release again. The Super Famicom release features improved graphics and audio over the original Family Computer release, including redrawn graphics by Yoshimiru Hoshi himself, additional scenes that were excluded from the original Family Computer release due to the lack of cartridge space, different background music (due to copyrights issues), and new artwork added to the ending. Players who pre-ordered the Super Famicom from Lawson convenience stores were given a set of five post-cards drawn by Yoshimiru.
Source: Wikipedia, "Metal Slader Glory", available under the CC-BY-SA License.