Like most scrapped characters, I thought Nack/Fang had a lot of potential. He's one of the few Mobian characters from the games that continues to be a villian in the end; all the others (i.e. Knuckles, Shadow, Rouge, the Babylon Rogues) became allies with Sonic. Not to mention he's one of the better characters to wield a gun. Shadow never needed one to begin with, so why bother?
What has me curious is his lineage. In some sources (and recently in the Archie series), Nack is described as being a weasel/wolf hybrid. And as we've seen in the Archie comics, interracial Mobian couples are capable of having children born as either one of their parents' respective species. Which begs the question; which one of Nack's parents was lupine? Is it ancestral? And since bounty hunting runs in the family, could Sleet the Wolf from "Sonic Underground" be a close relative?
Maybe I'm looking too into this. Overall, I still think Nack deserves some spotlight.