Playable Chaos marines in horde mode

Since players will not be able to play as chaos marines in operations please allow them to in the horde mode. Horde mode is supposed to be a “for fun” game mode and has no lore implications. It is a bit of a bummer that I can’t even play my favorite legion night lords unless if I get lucky in pvp. I think players would enjoy being able to fight hordes of enemies as their chaos faction of choice.