According to Entertainment Weekly, the MLP Facebook Page, and the MLP Booth at Comic Con, Season 4 has been confirmed! 
It will be released at Saturday, November 23.
As fans learned at Comic-Con last weekend, there’s plenty to look forward to in the cartoon’s senior season — including a musical episode for Pinkie Pie (in which “somepony will give her a run for her party planning money”), Pinkie Pie’s sister visiting Ponyville, a showcase episode for Rarity, and even more songs.
Even though, there isn’t any official Animated Sneak Peaks, there’s a drawn Panel from a scene from an episode. 