Green Mage probably will never be a proper job in XIV, maybe a Phantom Job at best, because a Job based on buffs and debuffs would likely end up either being too weak to be meaningful or a must have in every raid...

Also, Geomancer because of it's place in AST's story and why it actually belongs there, it's very unlikely to become a Job.

But for the outfit, it will have be to be seen. I hope they do give us outfits for all the Phantom Jobs, maybe even different versions based on all the different characters of FF5.