Ha, I can appreciate that viewpoint.

Palutena edges out Hades for me, but man I love every character in that game. If it came down to just one KI newcomer, though, I think we both know Palutena would get the nod. Her name's in the title, she has the legacy factor, etc. She has the advantage in every way.
Now if they were to add a THIRD character from Kid Icarus... Things would get really interesting. I can see them considering Hades, of course, but also Medusa, despite her limited role in Uprising, simply because she'd be the first female villain on the roster, and she was the original villain in the series.
And Japan being Japan and all... Viridi seems like she'd stand a chance. And then there's Magnus, whose physicality and move-set seems tailor-made for Smash. And even Dark Pit could be mustered as a clone that uses different weapons from Pit proper... although I hope they keep Dark Pit an alternate skin, like he is in Brawl.
Screw it, just turn Smash 4 into a Kid Icarus fighting game.