Jiku no Tsubasa (時空の翼, translated as Space-Time’s Wing) is a cancelled fighting / RPG hybrid that was planned for Famicom / NES by G.Amusement Co., a rather obscure Japanese company which published a few different games during the ‘90s (such as Final Stretch).
Unfortunately there are not many details available on this lost game, but thanks to Heimao we know it was going to offer two main modes: a “battle” mode and a “scenario” mode. Battle mode would have probably been similar to other 1VS1 fighting games, but the scenario mode would have been structured like a role-playing game.
As it often happens with old, cancelled Famicom titles, we’ll probably never see much more from Jiku no Tsubasa, nor know what really happened to it.
Thanks to Heimao for the contribution!