I have a theory now. So season 4 lacks in action and villains but, it talks about the equestria games. So when the equestria games come what will happen? Now I highly doubt the ponyville team will win sorry to ponyville but with muscle biceps they most likely will lose. Since they most likely will not compete (because who wants to see them lose) what will happen? Now I think a villain will come and stop the games. But who could it be? I believe it will be king sombra he has not been seen for a while and associates with the crystal empire the location of the games.