There are a lot of things I want for this game. Top of my list would be fixes and adjustments to the current stages so that they are all tournament-viable and some brand new stages to go with them.
Shimbori said they may look into adding the missing story scenes in the future. That is neither a promise or a timeline. Considering how the story-delivery mechanism was universally panned, I doubt it is a priority.
The story would have probably been alot better received if they included the missing scenes so I think they'll probably do it sometime next year. Naotora and more stages and hairstyles I would love most tho xD
Costumes are all we can really expect and they're all likely to disappoint. Rachel could be confirmed but we probably won't see anything of her until the week she comes out. I doubt they would add story scenes as DLC.
They're definitely gonna have to show costumes for this month there since the dlc is supposed to come this week coming, and think maybe Rachel will come alongside it or maybe in December