In addition to a terrific trailer for Luke Cage and confirmation that Daredevil will return for a third season, Marvel on Thursday gave fans their first taste of The Defenders. The crossover will bring together four heroes—Daredevil, Jessica Jones, Luke Cage, and Iron Fist—as they face an enemy that threatens to destroy New York City.

Unfortunately, the trailer doesn’t show off any actual footage, but that’s not the point. The point is to show audiences that these four superheroes will soon fight alongside each other against a mysterious enemy seemingly led by Daredevil’s mentor Stick.

The Defenders is set for a 2017 debut.