Young Justice in No Man's Land (1999)

Plot

A visit to the former Gotham proves more dangerous than expected for the members of YJ! Superboy and Impulse decide that the perfect way to cheer up their depressed buddy Robin is to go into Gotham and fix things up; It's a mistake they quickly learn to regret when they, plus guest star Lagoon Boy, find themselves needing help in fending off the bizarre plant woman called Ferak and the Kobra strike force that's closing in; will the Dark Knight reach them in time?