If/when they add Samurai, it might not be what you are expecting (having hopes that it will be nostalgic of XI)

As far as I know, the plan is to not add new jobs until the next expansion (Ninja was a special case as Yoshida believed it should have been present in the opening lineup of jobs)

We know now that they are being a little flexible with decision making and are responding to player feedback when prioritizing content, but until they say something... just assume it will be a long time.