Gonna get some flak for this, I'm sure! However, I wouldn't mind seeing Bungie tackle on a battle royale mode. (Not the kind where you have to loot guns and crap.) Just a nice giant elimination mode. Teamed or solo. If you need some story or something - Where the cabal have some sort of their own take on PVP event and Calus gathers up guardians inside a fleet of cabal dropships and they fly over a public space and there's a giant flag hub for their PVP public events and anyone in the area can participate as well. Then players are dropped in ODST style in cabal drop pods. Then the whole place is a huge warzone, like a meteor shower of drop pods shaking everywhere like warsat public events! Then the region is locked down for 15 minutes the only way out is through your ghost which ferries you back to orbit or in spectator mode... I'm not a huge fan of battle royale, but I would play that!