The latest screenshot from the official Super Smash Bros. website has confirmed that the male Wii Fit Trainer will also be joining the upcoming Wii U and 3DS games’ rosters.
Since there is no character page for him, one can safely assume he will be an alternate costume for the female Wii Fit Trainer.
With this inclusion, it’s possible we might see more characters that simply exist as an aesthetic double to other pre-existing characters. Dark Link and Daisy have have appeared as costumes for Peach and Link respectively.
We’ll just have to wait it out and see. Hopefully the next update will be revealed soon. Here’s hoping for Dixie Kong.