Here's what I remeber of the concepts:
Superman: It's basically Smallville plus six years. Clark moves to Metropolic and finally puts on the suit. Clark is still dating Lana, although it's a long distance relationship and thus rather streigned. Lex has descended furthur into madness and thus is at odds with Superman, even though he still sees Clark as his friend.
Batman: Batman is, of course, the vigilante protector of Gotham. Comissioner Gordon looks rather like Morgan Freeman. The Joker, instead of being a psychotic spree slayer, is instead a highly reckless and murderous vigilante who's methods put him at odds with Batman.
Wonder Woman: Diana, princess of a race of Amazonian warriors who have hidden themselves from the rest of the world for centuries. The Amazons are now preparing for a camapign of global conquest, starting with the world super powers. To this end, they have sent Diana to the United States as a sleeper agent under the guise of ambasadore. To help gain the public's trust, she wears a costume with the colors of the American flag.
The Flash: Barry Allen is a forensic scientist for Central City. When on a crime scene at STAR labs, an accident envolving some of the chemicals there granted him superhuman speed. He then became a crime fighter, quickly earning the adoration of Central City. Soon, a mysterious Dark Flash began showing up, terrorizing him. Barry was then shocked to discover that it was a future version of his nephew, Wally, who traveled back in time.
Green Lantern: John Stewart, a former marine who is chosen by the Green lantern Corps to patrol space sector 2814. Soon, however, he discovers a terrible secret. The Gaurdians of the Universe are long dead, killed at the hands of the highest ranking GL, Sinestro. Sinestro has been running the show ever since, spreading corruption throughout the entire GLC.
JLA: J'onn Jonzz, the Martian Manhunter (who looks like a cross between Yoda and ET), becomes aware that the intergalactic tyrant, Despero, is on his way to Earth. He then calls to arms six ehroes who could stop it. Clark Kent, aka Superman, Bruce Wayne, aka Batman, Princess Diana, aka Wonder Woman, Barry Allen, aka The Flash, John Stewart, aka Green Kantern, and Dr. Reye Palmer (now a black woman), aka The Atom. Despero lands on Earth, storms the U.N., and kills most of the delegates. He then heads towards the White House, and is stopped by the League. They soon mecome media sensations and are declared the Earth's Greatest heroes. A later storyline has the team asking each other for their secret identities, and Batman refusing to devulge his. This leads to him leaving the team and later defeating the entire group one by one single handedly.
Teen Titans: Lex Luthor, wanting to capitalize on the popularity of the League, forms a team that is essentially Menudo as a super hero group. The roster is:
Robin: A circus acrobat looking for stardom. No connection to Batman whatsoever.
Power Girl: Wonder Woman's kid sister, Donna, who left Themyscera looking for adventure. She took the name Power Girl to avoid copyright issues with Wonder Woman.
Green Arrow: Roy Harper, a sharp shooting vigilante from Star City. Secretly a drug addict.
Aquaman: Orin, the 18 year old prince of Atlantis. Is sent to the surface as a right of passage for claiming the throne.
Cyborg: Injured in a carr accident, repaired by Lexcorp.
Raven: A mysterious psychic goth girl.
The team becomes an instant success, becoming insnaely popular. But things go wrong when Roy's drug addiction is found out, and Donna accidentally kills a man on their first mission.
Personally, I don't care for alot of these ideas.
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