Here is what the developer had to say about the Invasion DLC:
Invasion, the third DLC Pack available for Call of Duty: Ghosts features four Multiplayer maps and Episode 3: Awakening, the next installment in Extinction’s four-part episodic narrative.
Multiplayer takes players on an international trip of mayhem. Explore an ancient Egyptian palace in Pharaoh, move through a Mexican Dia de los Muertos celebration in Departed, take to a Caribbean pirate hideout in Mutiny, and revisit the Favela in Brazil, a refreshed version of the fan-favorite Call of Duty: Modern Warfare 2 map.
Extinction continues its gripping storyline with Episode 3: Awakening. Descend into an alien underworld and strike at the mysterious puppet-masters behind the Cryptid invasion. Three new Cryptid species await players, along with some familiar enemies and allies.
Take a look at the Invasion DLC Pack Preview video below:
The Call of Duty: Ghosts Invasion DLC releases June 3 first for Xbox One and Xbox 360 with other platforms to follow.