well I looked it up because they gave us Freyr as new god so I thought why not recommend a new unit for the next DLC, here are my thoughts
For Greek
Hierophant : Half Rhino half human with hammer/mace weapon, his ability is bull rush which is ramming people like american football moves
Harpy : Four winged half bird woman, throwing sharp blade feather and ultrasonic screeching ability to stunt enemy
For Atlantean
Sahagin : Fishman unit, with ranged style combat spear throwing weapon, can walk and swim so you don’t need transport ship
Tithons/Tithonites : Giant centipede insect with burrow ability so they can hide or surprised stunt attack
For Egyptian
Gnoll : Humanoid Hyena with flail weapon, they can run fast, faster than infantry and cavalry, their ability is eating the corpse human unit or mythical unit for heal
Tomb Giant : Giant zombie/mummy, if Tomb Giant dies his body will spreading poison gas so enemy around him got poisoned
This is just an idea I got in my mind, i hope AOM devs would notice this, your suggestions are welcome