Considering the introduction of a character during the lv15 Rogue quest line, I am definitely beginning to think that Gunner is going to be one of the classes added in the new expansion. Not only does Grand Admiral Merlwyb openly brandish these weapons while fighting, but now a secondary minor character can be seen brandishing a gun as well. It could've been explained away if it was just the GC leader's weapons, but I feel there's a specific reason why they're alluding to the job now.

If I'm right, SE announced that there will be 3 new jobs with the expansion and spoiled Dark Knight as the first one. People are speculating that they want to add one of each role and it seems like Gunner has more of a foothold in the lore right now than any other dps option.