Season 2 is to start on September 17th!
Apparently there's going to be either twenty four or twenty six episodes, and we'll be seeing more of Luna.
Also; first episode confirmed and it's a two parter. Read about it below:
Equestria Daily: Season 2 Episode 1: The Return of Harmony (CONFIRMED for 2 Parter)
Episode 1: The Return of Harmony
Air Date: (Possibly) September 17th
Spoilered Synopsis: Discord escapes from his stone prison and Twilight and her friends act quickly to find the Elements of Harmony to stop him.