This is more or less what Bill said
"With the Wii U game you start to see more players who have come into Smash Bros. more recently, and they tend to have a real big affinity to some of the newer characters like Bayonetta, like Cloud, and uh, and even uh, you know the uh Xenoblade characters and things like that."
He was referring to characters who debuted in the Wii U version, and it seemed like he couldn't think up Shulk's name, so he just said Xenoblade characters, and as a slip of the tongue he said characters plural.
It probably means nothing.