The 4th Tank.

[Khalithar]

tbh based on how DRK turned out idk how SE can make more tanks. They seem to have run out of interesting ideas already and utilities are limited enough as it is sowhat would this new tank bring to the table that the other tanks don't. (same could be said for DRK actually.) Guess we could have a counter based tank but what would their utilities be?

Here is what other MMO's have for tanks that we don't have with the current tanks, how good/bad/likely these will be are up for interpretation:

Damage reflection/Countering (self explanatory).
Evasion tanking (tanking by not getting hit).
Damage Absorption (think a tank that creates mini-stoneskins a lot).
Ranged Tanking (a tank that uses a ranged weapon and has a mix of melee/long range moves).
Stealth Tanking (a rogue/assassin type class with a tanking option. Usually has a defensive move that directly increases values from armor).
Mage Tanking (a mage class with a tanking build that uses defensive spells. Could work with the damage absorption above).

That about covers all I can think of off the top of my head.