Not to mention the images used forthat box predate the SNES by more than a few years, so it is highly unlikely that this was ever meant to be an actual cover for a Super NES game. If it ever was legit, it was a placeholder at best.
By the time this game would have been developed, the McFarlane Spider-Man image was king, and while Jim Lee's X-Men hadn't yet emerged, they were far more graphically advanced than that.