They should be! For the first version, they will have reskinned vanilla units.. here are some details:
Bosporan Kingdom- Mixture of Greek and Barbarian units..
Greek: Militia Hoplites, Levy Pikemen, Phalanx Pikemen, Archers, Peltasts, Slingers, Light Lancers, Greek Cavalry, Militia Cavalry
Barbarian: Warband, Axemen, Skirmisher Warband, Archer Warband, Spear Warband, Barbarian Cavalry, Scythian Horse Archers, Scythian Nobles
Nabataean Kingdom - Eastern and Desert Units
Units: Town Militia, Eastern Infantry, Hillmen, Desert Infantry, Bedouin Swordsmen, Nabataean Guard, Peltasts, Slingers, Archers, Bedouin Archers, Arab Cavalry, Arab Light Cavalry, Horse Archers, Bedouin Camel Warriors, Bedouin Camel Archers
Illyrians - Barbarian with some Greek units
Barbarians: Typical Barbarian Roster
Greeks: Militia Hoplites, Peltasts, Light Lancers
Unique: Illyrian Pirates, Illyrian Skirmishers
There will also be reskins for the other factions..
In our next version there will be many entirely new units!