Neo: Live Remix. Since Neo has established the concept of team combat with more than 2 players, imagine a team based twewy mmo. Basically, I'm imagining Live Remix but with the Neo Beatdrop system, where team members can join you on missions to help you out, with a couple of changes:
-Players can equip 2-3 pins. Having only 1 pin seems too restrictive and having 6 pins feels like it would break the game.
-Limited to 3-4 players per mission. For balance reasons.
-Player can activate Beatdrops with a different pin from the one that initiated the Beatdrop. So solo players can still use Super Moves.
-Super Moves are solo moves and Sync is used up individually but gained at the same time by all teammates. There could be a bonus for using a Super Move at the same time as your teammate(s) though.
Note: this is just a concept I thought would be cool