Hear me out... Anarchy Reigns style Blazblue brawler
They've done fighters and roguelike beat-em-ups, why not have the next spinoff be a 3D brawler ala Anarchy Reigns style. Light attacks, heavy attacks, drives, distortions, giant bosses (Like the giant Tager Kokonoe uses in some of her moveset), large scale fights etc
Figured I'd post it here as it's an idea I've had rattling in my head for a bit now.