Pony General:"Season 12 will never air" edition.

New preview:

http://www.youtube.com/watch?v=XZ02Ifa0nfo

 Synopsis

In the two-part episode "A Canterlot Wedding," the kingdom is in a frenzy preparing for the wedding of Princess Celestia's niece, Princess Cadance, to Twilight Sparkle's brother, Shining Armor. However, Twilight Sparkle discovers a dark secret about the bride that could ruin her brother's "happily ever after."