Yes, creating a new SG-1000 version is a good idea, maybe also some more colors could be added, but I don't know, how many this very old console can handle, at the same time?
If you're thinking about new ports of the game anyway, then maybe also a new Master-System port would be conceivable (it could have improved graphics then, because the SMS is technically a bit stronger) or perhaps also a C64 port, that would be really cool too. Or a Amiga-500 port of the game, this could even have the same graphics, the Arcade version has. Just suggestions of course. :-)