Halo Battle Royal foundation has already been laid for Halo Studios. 

Spawn in using ODST pods.
Halo has 100s of maps and lore to base the BR map around.
Halo has a well rounded amount of different types of guns.
Halo has Power ups like Over shield, invis
Halo has vehicles, mongoose, warthog.
Halo has a great health/shield system that requires no change for BR
Halo has armor abilities that can be used as pick ups around the map like jet pack, grapple hook. 

Anyone who says it wouldn’t work hasn’t played enough Halo to understand. It’s the perfect game to have a BR since it has EVERYTHING a BR needs.