Err, never thought of it, I was busy thinking of gametypes, like these:
Mixed species slayer:
With the introduction of differences between Spartans & Elites, and species vs in two solid game modes along with a Grab bag game type, the next logical step is to mix it up! Both species can be on the same team, and one can alternate between the two! Elites have one set of Loadouts, and Spartans have another. IT'S GENIUS!
Werewolf:
Yes, The remainder of my Ideas effectively classify as infection gametypes. In this one, one starts out as an Elite, while the rest are spartans. The elite has extremely High health, so only a Headshot is going to kill it instantly. The Spartans have to whittle down the "werewolf's" health to kill it, not an easy task with ARs (currently this is my go to). The "Werewolf" is equipped with an energy sword, along with abnormal agility. The Elite will have an easy time picking off humans, but this isn't the case vice versa. The Last man standing gets a sniper rifle, easily capable of killing the "Werewolf" with a shot to the head, if he can make the shot...
Demon:
Essentially the above, but reverse. This time it is the Spartan who has high health & agility, along with the power weapon (this time a shotgun). The Elites, with only plasma pistols, have to hold him off until one gets a needle rifle to defeat him (again, last man, er, Elite standing).
And that's it. So... wait, the new starters were revealed?
(Five minutes later)
The fire type one is apparently a pig, ****