A second clip was also screened. Superman informs the League that there's been an explosion at Project Cadmus. The kids are told to stay behind while the adults take care of it, but they decide to investigate anyway. They infiltrate a lab of some kind. The scene picks up the pace with quick cuts as the young heroes engage in Mission: Impossible-esque acts of espionage. Suddenly the Justice League shows up, dropping from the sky -- Wonder Woman, Green Lantern, Superman, Hawkwoman, Captain Marvel and others. And then… Superboy/Connor suddenly awakens in the lab and flies towards screen. End of clip.