The first trailer for Zack Snyder’s Justice League premiered on Saturday at San Diego Comic Con, bringing together an all-star group of superheroes from the DC Comics world.

In the trailer, which was a surprise for fans in attendance, stars Batman (Ben Affleck), Wonder Woman (Gal Gadot), The Flash (Ezra Miller), Aquaman (Jason Momoa), and Cyborg (Ray Fisher) to form an unstoppable team. Henry Cavill, the actor behind Superman, is expected to make an appearance; however, he wasn’t shown in this premiere.

In the footage, Bruce Wayne is seen meeting his team members as he constructs the Justice League. The teaser has a few lighthearted moments, which a stark contrast to the darker tone found in Batman v Superman. There’s a particular scene where Wayne meets The Flash for the first time: “So you’re fast,” he says. Later on in the trailer, Wayne has an interaction with Aquaman and cracks a funny joke: “I hear you can talk to fish.”

Justice League will also star J.K. Simmons, Willem Dafoe, and Amber Heard. The film is expected to hit theaters on Nov. 17, 2017.