My predictions:

Additional Jobs
Marauder->Dark Knight
Gladiator->Red Mage
Archer->Ranger
Conjurer->Geomancer?
Thaumaturge->Geomancer? (one or the other)
Pugilist->Dancer
Lancer->?

New Classes/Jobs
Rogue->Thief/Ninja
Gunslinger->Corsair/???
???->Beastmaster/Bluemage