There Is No Dancer (yet)

[Kaurie]

Zenos yae Galvus uses a katana and dresses like a Yojimbo cosplayer, so maybe Samurai?

Potentially, but there is no precedence that an antagonist is a hint at a playable job.

Conversely, there is precedent that Yoshi's T-Shirts are hints (see FanFest for Heavensward). Also, someone claimed that the rangers from the Moonfire event were supposed to hint at new jobs and the Yellow pose = DNC FFXI pose. I don't have a source on Yoshi saying they are a hint, but there is a comparison image on page 11 of this thread.