Let's see...

3 out of 4 Tanks
3 out of 5 Melee DPS
1/2 out of 3 Physical Ranged DPS

0 out of 4 Healers
0 out of 4 Magic Ranged DPS
1 out of 11 new jobs (SAM...SCH/SMN/DRK/AST/MCH/RDM/GNB/DNC/SGE/RPR) and only DRK was used in a later expansion

So, if the new jobs are Physical Ranged DPS and/or Magic Ranged DPS, it's especially unlikely they'll get used. It's clear they're going for a cool/heroic/leader factor with the WoL (they even waited until DRK could be used in a "heroic" fashion). As for trying to rank the remaining jobs' odds based on this information:

GNB (Only tank left and hasn't had any time in the spotlight)
NIN (Shady and might not be the WoL's style, but could go well with a new Scouting job and it's the only 2.0 DoW left)
MCH (Flashy and the most "solo" job there is)
BRD (Not really a solo job, but he's already an Archer)
BLM (One of the cooler, more iconic jobs and already had some marketing, but not as heroic)
RPR (Also not as heroic and a bit saturated after Zenos/Zero but could capitalize on them)
BLU (Good opportunity if they go to the NW, even if they don't make it a full job)
RDM (Stylish, but saturated because of red Alphinaud in the EW trailer)
SMN (Are books not badass enough?)
DNC (Probably too "girly" for the WoL and not much of a solo job, even if it's not a mage)
WHM (Healer...but a popular and powerful one)
SGE (Stylish, but saturated because of blue Alphinaud in the EW trailer)
AST (Are cards not badass enough?)
SCH (Same as SMN but also Healer)