I'd say none, NIN was a special case because it was something promised for a long time and they finally delivered but it was one of those things they wanted to release before an expansion and not with or after an expansion.

the other 3 jobs are a test of insanity, they've made it rather clear that they have no plans to ever do that again and with good reason, it's hard as heck to balance. I mean if we look at XI we can all agree they didn't really push hard enough to keep all the jobs balanced, but 14 does it's best to keep everything balanced. With that said there are of course still issues that need to be ironed out, but it's because of those very issues I don't see them pushing a new job in the 3.0 era nor do I expect to see new jobs in 4.0.

However There were little nudges as how they could introduce new jobs that don't exactly fit into roles, or play with others nicely, like BLU they used as an example that it could be a job designed for solo play. So perhaps we might see something like that in the future, however when it comes to party based jobs being introduced, if we do see one it won't be in 3.0 but there is possibility it could be in 4.0

For anyone that's done NIN job quest and just the representation of each story seems to be about revolution and rebuilding. I get the feeling that we might go to the far east and help Yugiri and other clans with their issues and assist them against the Garlean threat.