The Avengers: Earth's Mightiest Heroes/Justice League: Unlimited/Transformers: Prime/My Little Pony: Friendship is Magic/Foster's Home For Imaginary Friends/Randy Cunningham: 9th Grade Ninja/Ben 10/Regular Show: The Quest Begins is an aniamted film which stars the characters from The Avengers: Earth's Mightiest Heroes/Justice League: Unlimited, Transformers: Prime, My Little Pony: Friendship is Magic, Foster's Home For Imaginary Friends, Randy Cunningham: 9th Grade Ninja, Ben 10 and Regular Show.