World's Greatest Heroes

World's Greatest Heroes is an upcoming fanfiction series by newcomer ComicGhost.

Plot
All the world's superhero teams join together to become one big superteam...but not just yet. First, they must unite against a mysterious force that threatens the very existance of our world...

DC Teams:

 * Justice League of America
 * Justice League
 * Justice Society of America
 * Teen Titans
 * the Titans
 * the Legion of Superheroes
 * the Doom Patrol
 * the Forgotten Heroes
 * the Outsiders

Marvel Teams:

 * the New Avengers
 * the Mighty Avengers
 * the Invaders
 * the New Warriors
 * Counter Force
 * the X-Men
 * the Fantastic Four
 * the Thunderbolts
 * the Defenders

Nickelodeon Teams:

 * the Champions of the Earth (team created by ComicGhost)