I mean it's to be seen yet, but SE love patterns, next expac will maybe be Tank and P Ranged DPS. SB was a melee DPS and a Caster DPS, ShB was tank and P Ranged DPS, EW was healer and Melee DPS, DT Melee DPS and caster DPS, so logic might dictate we will get a tank and P Ranged DPS next expac.