So a lot of people been wishing for ogres for years I guess. Let me just throw some stuff at the wall and see what sticks. Hold on , let me cook.
-3rd mercenary faction (definitive BAD DUDES
-Midnight patch X.x
-Can participate in world PVP for sure, specifically invented for world PvP (BG inclusion maybe an XPAC or 2 later).
-Profit$$
-Since alliance and horde are hugging it out. We need to put the WAR back in WARCRAFT somehow am I right ? (Rhetorical). subjectively speaking
-Give Mercenary bad dudes faction Pros and cons
- I.E ogres can’t fit in doors lol.
- Naga don’t do well WITHOUT WATER
-The best idea ? 
-Force a few existing races—> (maybe optionally)—> : into new 3rd mercenary faction.
-HIGHLY invest in world PvP content and number of events and incentive for continuous reason (rewards) to invest time into world PVP. (TBC hellfire peninsula ? Zangarmarsh?) but on ROIDS.
-MAKE IT REALLY FUN engaging.
- PROFIT $$$$$.
-Thanks
P.s: give us purple fire on DH , why not ?