I think giant snakes would be extremely cool (I like snakes).

Anybody thought about including some sort of anti-air artillery piece in new fantasy factions? I imagine something along the lines of (8)4/4 (imagine three carts firing 40+ arrows/darts each) and a range of 17.5" with a (-2)0/0 penalty for attaking grounded units. Might have trouble taking out dragons though...