[Update]: Total War: Troy will be fully embracing its mythological side with the new Mythos expansion.
In order to counterbalance the impact of Amazons, Total War: Troy's newest piece of DLC has now added two brand new Greek factions to mess around with. Salamis is led by the mighty Ajax, while the young king Diomedes is in charge of Argos.
Much like the Amazons that came before them, each of the two new lords sport their own unique abilities and faction mechanics. There are also 18 new units to utilize, Paragon regiments that essentially function as Regiments of Renown from other Total War games, and even a brand new event to help you conquer Troy.
You can get a bit of a sneak peek at some of the new units and mechanics through the freshly posted trailer. Have a gander:
On the free side of things, Patch 1.5 has added Hephaestus (God of Blacksmiths and Volcanoes), a Divine Craftsmen agent, as well as a whole host of balance changes and performance improvements. There's far too much to summarize, so if you're interested in all of the specific details you'll find the full patch notes over at the Total War website.
As for the DLC itself, you can learn more about Ajax & Diomedes, as well as check out some of the reviews, by hopping over to the Epic Games Store.