I would really prefer a series. The storyline and line-up could be a mashup of the first two incarnations of the book.
I think it would be cool for Batman to actually become an Outsider to the super-hero community himself, as a wrap-up of TB&TB. Maybe framed for some sort of super-crime, and all his allies from past episodes refuse to help him clear his name. He decides to become a loner again when he begins to meet other heroes who have been similarly defaced. They decide to ban together and find the root of the problem.
That would be Baron Bedlam, a vampiric tyrant of the former Soviet country of Markovia. Kind of an unhinged megalomaniac, he is determined to bring about the fall of the world's heroes by framing them for crimes with the help of his genius advisor, Bad Samaritan. They've started out small, first humiliating Markovia's own hero, the gravity-controlling Geo-Force. They have since moved on to other lesser known heroes: Japan's Katanna, Africa's Halo, Metropolis' Black Lightning and Gotham's Looker in the USA, and the globe-hopping Metamorpho.
Batman is the first of the big names on their list to fall to Bad Samaritan's devious propaganda machine. With the world's greatest detective now suspect, the door is open for the world's heroes to be duped and disbanded.
Waiting in the wings is the Baron's own demented band of "superheroes." The Masters of Disaster secretly commit the crimes, frame the heroes, and then publicly mop-up after the good guys fall from grace. They are the new faces of justice, and the public is eating it up. Governments are clamoring to ally themselves with Markovia, and the tiny nation's power is growing.
Batman and his new team uncover that Bedlam is an old Nazi vampire, and the Bad Samaritan is actually the vengeful spirit Eclipso in his latest guise. Once the world has put their trust in Markovia and its new heroes, then the deception will be revealed and a new dark rule will have already begun.
Batman and the Outsiders must fight the efforts of Bedlam as they each individually struggle with their own distrust and individual frame-ups. Im thinking the team could grow by one each episode for the first season, introducing a new Outsider victimized by Bedlam's schemes. This would keep the flavor of TB&TB as a means of transition to a regular cast for future seasons.
Well, that's a lot of writing about a tv show that will probably never exist, so I think I'll stop now.
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