Animated TV series "The Avengers: Earth's Mightiest Heroes!", featuring Marvel Comics characters "Captain America" and "The Wasp", returns to Disney XD Sunday, May 15, with the first of seven new episodes :
"...On the hottest day of the year, an ancient artifact is found ... and a cold wind blows. An ancient 'Asgardian' relic called the 'Casket of Ancient Winters' has been opened, and the entire planet goes into a deep freeze. But as the rest of the 'Avengers' deal with an invasion of 'Dark Elves' and demons, 'Iron Man' and 'Thor' must put aside their differences to battle 'Malekith the Accursed'..."