If anyone goes ask if the story mode is set up like WFC or DOTM (DOTM allows only one selectable character for each stage unlike WFC). Also ask about host migration and how many playable characters and who.
Although I'd like to see them answer the "who" part of your question, I think it is unlikely he'll answer that part so early on. The rest of your questions though shouldn't be too hard to give a yes or no to, however...IMHO