During my time with Destiny I've noticed a shared weapon type amongst all the enemy factions. Let's call it a grenade launcher for simplicity's sake. Could it possibly be a look at what's to come at some point? Cabal- WH 40k bolter-esque weapon (can't remember the name) Hive- Boomers Vex- Mortar Launcher Fallen- Servitor shots (it fits, but since it's limited to one enemy type it may be a stretch) I for one hope that at some point they add a grenade launcher heavy to the game. If HoW is any indication, we could possibly see them added as a new weapon type even if it's only as an exotic like the elder ciphers (specifically the dreg sidearm). Since every enemy faction already uses some form of one, the mechanics of how they operate and behave are already there.