I'm actually a fan of Kamek and would personally love to see him playable, but I regognize he has no chance. Unless the Yoshi series more distinctly moves itself apart from the general Mario series, Yoshi games will be treated as Mario games for the most part. Kamek could start appearing in the RPGs and get dialouge to gain more popularity, and he'd fit the role well (Seeing as Kammy replaced him in what was basically his role.).
Sadly, I also a a "fan" of Krystal in the same fashion I am of ZSS. I don't consider myself a "furry", as it's basically a human body with a slightly changed head and tail. I originally was one of the fools that supported her without even playing a Starfox game due to this, and I'm sure there were plenty others who did as well. This is why I'm thinking Tedius is so obsessed with Lyn in the same fashion those people were with Krystal, as it's the only way somebody could randomly want such an obscure character.
I've since looked into Starfox and find Wolf much more deserving, as Krystal has as many haters (Who are obsessed with saying "YOU LIKE KRYSTAL U R FURRY") as she has fans, somewhat like Waluigi. Actually having played Starfox 64 on virtual console, Wolf's bad assery is much more appealing, and Wolf's moveset may as well be unique anyway. . .Just remove the landmaster to kill the fad, Sakurai.
If an actualy decent Starfox is released with Krystal having a decent role before SSB4, her support will remain for SSB4, whether or not Starfox deserves four characters. Here's to hoping no series outside the big three get four characters until SSB5.