From GameWatcher: “Babylon is set to become Civilization 6’s newest playable faction when the November 2020 New Frontier Pass DLC launches later this month.
The Babylon Pack will also introduce six new City States one for each available type no less than 24 new Great People, alongside the Heroes & Legends mode to Civilization 6.”
Source: N4G PC Civilization 6's Fourth New Frontier Pass DLC Adds Babylon, Heroes & Legends Mode