Hmmm... well, we know 6.0 is happening (which bring us to 90) and following that, 7.0 will take us to 99/100, whichever they decided to cap at. Which means that's about four new jobs, not counting limited. Yoshi-P said they want everything as balanced between the five roles as possible.

A healer and either a caster or melee DPS (maiming or scouting, probably maiming) for 6.0, and then for 7.0 a Ranged and either caster/melee, whichever we didn't get in 6.

Healer- Green Mage, basically the Healing version of Red Mage, wielding a magic hammer or mace. Have like, 'white cures' that buff the party and 'black cures' that heal the party and damage the enemy.

Melee- Rune Knight, drawing inspiration from Zidane's Dyne techniques and using Dual Blades. I'd like to see it using the heavier Maiming armor, but scouting could work too.

Ranged- Corsair. How'd I'd like to see it would be basically the opposite of red mage, staying up close until it's ranged burst phase.

Caster- Geomancer. I just think it'd work better as a caster than a healer, personally. Outside of that... a caster that has chain bonuses for spells like melee do for their weapon skills. The instant casts would cut down on initial potency, but adding bonuses would make it worth it. And the combos would fill their gauge to allow them to use bigger spells that did have cast times.

Or a Time Mage that was basically the buffing DPS mage. Actually, combined that last idea with Time Mage, and it might work. High utility, low personal DPS