My guesses / hopes / ideas for 3rd subclass:
[b]HUNTER[/b]
The Bowmaster/Archer (afterall, we are 'hunters') - Special - unlock a bow that has 3-4 shots (no timer on it) - how awesome would it be to lead an arrow across the map for a kill. Maybe choose 1 of 3 perks for solar/arc/void arrows. Any other ideas for the perks that could be offered?
[b]WARLOCK[/b]
The Summoner - Special - Summon a companion / pet. You can choose 1 of 3 perks for a fire/arc/void pet. Maybe choose 1 of 3 perks for the pet to either attack/defend/scavange ammo for you. Other ideas?
[b]TITAN[/b]
The Mechanic - Special - Summon a 3 person vehicle for the team (driver/passenger/gunner - like Halo Warthogs) (in strikes or crucible) - maybe in non-vehicle PVP maps, special summons an immobile turret. Perks could include anti-vehicle options and claymores. Other ideas?
Not sure if Bungie has developed the third subclasses yet, but as a hunter, please....please please give me a BOW
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Warlock - Arc Based Titan - Solar Based Hunter - Void Based Hunter and Warlock should be support type supers and Titans should have another offensive super.