I don't think thats true.
Ashley is in there, but she appears in the warioware stage I believe.
If that was true I would be happy though.
EDIT: Here is the original video from where it is from: http://www.gametrailers.com/player/29966.html
There is a question mark floating accross it in the video, and they give it no special attention. I think its supposed to be a speculative list.