Since I am not aware of any official news, this is more of a "Do you think there will be..." question.
I don't have a 3DS, but will be getting one for Pokemon X/Y. I'd love an X/Y themed 3DS, but with the Pikachu 3DS being released recently, I'm doubtful.
(By "Will there be..." I mean released within a month of X/Y launching.[)