Dracula Jr., that's the one that wasn't shown and that's all that wasn't shown.
Spirits is probably related to [monster hunter dragon i always forget the name of] because he said it was boss character, but not what kind of boss character. You obviously have bosses like Metal Face, but it could be related to Spirits (or maybe even Classic mode). I hope current stage hazard bosses like Metal Face and the Find Mii antagonist get expanded upon.
Actually, I do have one.
Will the Final Smash Meter be viable for competitive play?
I'd like to argue that it's dependent on certain characters and certain Final Smashes. If it's allowed,
will skyrocket in the competitive scene for how Critical Hit will still OHKO you. And some inescapable (or near inescapable) final smashes like
may play a large favor in their endgame as well. I find this pretty interesting since a lot of people are 50/50 on it.