Tagged characters

Aqualad (Earth-16), Aquaman (Earth-16), Batman (Earth-16), Black Canary (Earth-16), Captain Atom (Earth-16), Captain Marvel (Earth-16), Flash II (Earth-16), Green Arrow (Earth-16), Hawkman (Earth-16), Hawkwoman (Earth-16), Kid Flash (Earth-16), Martian Manhunter (Earth-16), Red Tornado (Earth-16), Robin (Earth-16), Superboy (Earth-16), Superman (Earth-16), Wonder Woman (Earth-16), and Zatara (Earth-16)

This picture is from the Young Justice: Fireworks gallery: