What doesn't help Dark Pit's chances is, again, the fact that his design is literally Pit's black "Fallen Angel" palette swap from Brawl; there is no uniqueness in his design whatsoever. While he wouldn't have a cloned moveset, potentially having a very unique one, he would be a horrible newcomer choice, indicative of over-representation (because it's well-known that Kid Icarus is one of Sakurai's babies). Keep in mind that Shadow the Hedgehog and Dark Samus, two other dark versions of characters, would have had unique movesets if they were playable as well, but that didn't help their chances. On top of that, Dark Pit has very little (if any) demand, even in comparison to the aforementioned dark characters; before his brief appearance in Palutena's introduction video, he was probably only an afterthought in a few (if any) SSB4 discussions.