The 3D animated flick of the oh so popular ANGRY BIRDS is going to come out next summer and the trailer is really promising. It is that untold story we all were wanting to know.Well finally find out why the birds are so angry,phew! The movie takes us to an island inhabited entirely by flightless yet birds or almost entirely. In this paradise of sorts, Red, a bird with a major temper problem, speedy Chuck and the volatile Bomb have always been outsiders and it is not an easy life for them. But when the island is visited by mysterious green piggies, its up to these unlikely outcasts to figure out what the pigs are up to.