Avengers: Earth's Mightiest Heroes will make its debut on the Canadian television network Teletoon on Friday, October 22 @ 8pm. Official description:
When the planet is threatened by Super Villains, time traveling conquerors, alien invaders, mythical monsters or mad robots bent on the total destruction of humanity, the Avengers assemble. From Iron Man and Captain America to Thor and The Incredible Hulk, the earth's mightiest heroes come together to protect the planet from menaces.I haven't heard anything about the American release date on Disney XD, but I do know that the Avengers micro-series will debut on Disney XD on Wednesday, September 22.
What is this micro-series, you ask? Marvel Animation has produced twenty 5-minute episodes that provide a backstory for the heroes and villains seen throughout the first season. The micro-series will be released on marvel.com, teletoon.com and disneyxd.com the same day they air on Disney XD.