After unsuccessfully attempting to recruit the Green Arrow to join the expanded League, he plays an important role with a team sent to manage a crisis in Asia.
Did You Know?
's official website explained why certain characters such as Blue Beetle, Mary Marvel, Black Lightning, Plastic Man and Sandman did appear. Firestorm (from the Super Powersseries) was considered until Waverider was added and a new character named Firestorm was created in the comics. DC Comics did not give the rights for Black Lightning to be used, and have Robin, Batgirl and others from Batman comics on a banned list. Steel II, Vibe, Hawk, and Dove are in the series since they remained alive in the DC Animated Universe, though they did in the comics. The character of Galatea was created as a substitute for Power Girl. See more
When General Kwan rebuffs the Justice League, the sky in the background reveals daylight, but when John is at the Javelin contacting the Watchtower a moment later, it has changed to night. See more
So, aren't you going to give me the "You did good" speech?
You're headstrong, unprofessional, and reckless. If you ever jeopardize yourself or your teammates again by running off half-cocked without a battle plan, I will personally see you're kicked out of the League. I don't care who your cousin is. And incidentally... you did good.
References Adventures of Superman