I've gotten the impression that you guys don't know what the season three finale is about other than Twilight gets wings. If you wanna know, keep reading. If you don't wanna know, get outta here.
Okay. So Twilight accidentally switches her friends' cutie marks. Naturally, Ponyville goes to ruins. Remember those pictures of various places in Ponyville that were in ruins? The one that was released before the season three premier? That was actually a reference to the finale. There's also a leaked song here: [link]