SE also revealed details about the new jobs and races in the expansion, and the reveals were surprising controversial.
Other than the previously revealed Gunbreaker, the second new job will be Dancer. Dancer is going to be a ranged DPS class that uses throwing weapons. It's in the same category as Bards and Machinists. FFXIV differentiates between "ranged DPS" and "caster DPS". Ranged DPS are usually more support oriented.
Apparently a lot of people were expecting Dancer to be a healer. The forums are full of salt from disappointed healers.
SE also revealed the new races: Hrothgar (male-only bestial cat people); and Viera (female bunny girls). There's only one of each gender, and that decision is even more controversial than Dancer.
SE's reasoning was pretty logical from their point of view. Apparently they only wanted to make two more rigs because of the amount of work multiple races cause. They wanted to do Hrothgar, but they knew that players would be extremely disappointed if Viera were never made. So they swapped female Hrothgar for female Viera.
Personally, I'm okay with having races with only a single gender represented, especially in a game where race is mostly cosmetic. Gender-locked classes are more annoying.
All in all, Shadowbringers is looking pretty good. The final Main Story Quest installment for Stormblood just came out yesterday. I haven't done it yet, but hopefully I'll be able to get to it soon.