The next episode is where Rarity has to decide to leave her old friends or stay with them, but http://mlp.wikia.com/wiki/Hearth%27s_Warming_Eve summary states the six friends are in a play. So that seems like a little spoiler. As Rarity will probably decide to stay with her old friends. I could be wrong, but more likely I'm right. Does anybody think that is a spoiler as well?