All over the globe, large swathes of humanity flock to cities to live, work, create, worship, and even die. So it's not surprising that several cities in the Marvel Universe and their populations are under attack by powerful alien invaders interested in those ideas. Collectively these individuals are known as the Ashen Combine, and their global campaign to corrupt, manipulate, and kill these cities has them going toe-to-toe with the Earth's Mightiest Heroes. Their battle is the subject of the current arc of the new volume of Avengers by writer Jed MacKay and artist C.F. Villa.
Source：https://www.cbr.com/avengers-4-jed-mackay-interview/
