There was some slight confusion earlier when Nintendo of America implied on Facebook that your character submission for Super Smash Bros had to be based on a Nintendo character. One of the readers has reached out to Nintendo of America and a representative has confirmed that any video game character is eligible for the Super Smash Bros DLC. You can vote for Banjo, Rayman, Bayonetta, and any other character of your choice. Here’s the email response.
Thanks for writing to us. I can certainly understand your interest in if third-party characters are eligible for the Smash Bros. Fighter Ballot. I want to assure you that you are able to submit any video-game character for this ballot. While we are unable to guarantee your suggested character will become a Super Smash Bros. Fighter, rest assured, we do take all feedback into consideration.
Thanks, Daniel R