Quote Originally Posted by Starlord View Post
By what means should I believe the gun class will be a healer? We barely know anything about the class.

And seeing a 4 year class that's not even playable yet as a tease is "quite low" to me but hey we all have different ways of seeing things.
At the US fanfest they made numerous references to various knights and batman as a dark knight and they even wore a batman shirt. The following week they formally announced the Dark Knight class.

At the London fan fest when Yoshi took off his Black Mage AF he was wearing a 007 shirt. Following the same line of "hints" we end up at the current target of speculation. The agent. http://finalfantasy.wikia.com/wiki/Agent The agent is gun weilding healer. (Obviously without the all female aspects I'm sure)

They've also in the past said they would be releasing a new tanking and healing job in the expansion. New healer class + gun class + 007 shirt hint = Agent as the current speculation. Pretty reasonably if I do say so.