Looks like Little Match Girl is coming out as a DLC. 
I think they may still be promoting the code-download D: I don't think it'll be for sale in the first catalog, which is kind of unfortunate.
I have to say, though, something that caught my eye a few times was the Flower Boots in the screenshots (Numu had them on Takane in one of those SSG videos for a bit, as well). I wonder if they're including some of L4U's DLC extend costumes as defaults in iM@S2? That's exciting

Also, if anything that anyone wanted to blame RK not being produceable on...it should be the amount of stages in the game XD Seriously, there's a lot. Not that I'm complaining.
Specific stages for quintet performances? (I wonder if that's why we haven't seen that stage with the train around it since the first PV...)
edit: wow, look at all these save slots for videos and photos.

