Krystal the feisty fox from the Star Fox universe will be making an appearance in some form in Smash Bros. Brawl with the voice actress behind Fox McCloud's lover announcing it via her webpage.
Alesia Glidewell, the voice of Kystal in her various game apperances, will be also voice her in Brawl according to her website.
She'll also be voicing the previously announced Knuckle Joe from Kirby & Zero Follow Samus from Metroid.
Thanks to Zero for the tip..