iD Software (those who made Wolfenstein 3D and Doom etc.) made Super Mario Bros 3 (or at least some parts of it) for the PC back in the days, hoping that Nintendo would license that game. But Nintendo didnt license it.
Could there be a similar story with Virus, that some 3rd party developer made the game in hope that Nintendo would license it?
EDIT: I see now that the Virus title screen says "(c) Nintendo", so i guess not. Seems like an internal made Nintendo game then, or?