Would be quite funny if it was Raubahn. I mean he looks nothing fitting to be a Red Mage lol, but I just had a quest in the MSQ where he was blasting off fire magics and jumping around the arena between magic and melee combat (of course, Immortal Flame theme fits well enough- I just think it'd be funny if the big bull turns out to be a Red Mage XD). Maybe his child, getting the elegance from his mother (he's adopted by Raubahn, but like.. we know what Raubhan is up to... lol) and the unique magic and combat flow from his father - lalafell red mage~
Talking about the shirt, I thought it was Blue Mage.. The whole getting bit and gaining powers, using that which hurt you to make you stronger, the strong red vs blue theme in the trailer, that two DD jobs seems like a great way to kill the queue times, while taking damage is greatly fitting for a blue mage job theme (tank), and blue mage has fit well in eastern themed areas (like FFXI's). Although maybe they did three? Or like half way through will introduce a third one? Iirc they didn't really want to do three so close together again, but that was a while ago - could have changed their mind.
The whole author name of a comic thing seems super sketchy but the spiderman samurai is pretty good. Also the art from the recent live stream, big Katana wielder in one of the arts. I thought he was leaning to make Samurai a DD though, and two DD again is just like good bye queue times for other DD classes lol. Happened with Ninja, some people were paying tanks and healers for a short while XD. Which I then also thought back to Blue Mage, if Blue Mage fits so well to be tank (imo) then Samurai if coming out near same time could be more easily placed/argued into DD.
I don't really see dancer besides the girl's outfit and some of her movements, but who knows could be~! I really like Blue mage, so I'm hoping for that, but I wouldn't be sad about Samurai either.