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The "deluxe" version of the King of Braves GaoGaiGar FINAL Grand Glorious Gathering DVD box set contains a special disc called Disc Z. One of the features on this disk contains information about a new GaoGaiGar work entitled Project Z. This project brings GaoGaiGar in even closer relationship with Betterman by reintroducing the corporation Akamatsu Industries. They cooperate with GGG to build the Neuromechanoid Kakuseijin GaiGo, with GaoGaiGar characters Mamoru Amami and Ikumi Kaidou as its Head Divers. Betterman Lamia is also seen to make an appearance. The project is resurrected in the form of a novel series titled Hakai-Oh ~GaoGaiGar Vs. Betterman~ .