https://www.youtube.com/watch?v=ryAPxZNVKBIA nice lengthy trailer came out. It's japanese, of course, but still awesome. Some things I noticed:
-Some of the characters who seemingly got shafted in the partner reshuffling are returning as support units, ie Estelle and Leanne.
-Edgeworth (Ace Attorney) and Tiki (Fire Emblem) both make appearances! Not sure if they'll be support units or just NPCs, though, as they were shown only in dialogue scenes.
-Genmu Zero is back, appears to be a multi-enemy attack again. Nothing on what X is doing during that move, though.
-Still haven't heard what Zero's theme is for this one, but the soundtrack listing includes "Opening Stage: Zero", so that would seem to narrow it down to 3, 4, 5, or 7.
-One of Lucina's attacks involves her firing off a bow in the Bride outfit.
-Ken and Ryu fight each other at some point, and it seems like Ken's the one going evil.
-Shooting minigame lets you play as either Xiaomu or Valkyrie. I'd be surprised if there wasn't more.
-Apparently Saya has a bunny friend now? ???
-Seems there is a lot more customization, although without being able to read the menus it's hard to say what exactly.
Also on DeviantArt, Rumble, DLive.tv, and the Fediverse (@freespeechextremist.com and @bae.st)