Piglantis

Piglantis is the twelfth season in Angry Birds Seasons. It will be released at the beginning of the Summer Solstice on June 20, 2012. It was revealed via GameCenter and announced on AngryBirdsNest.com. Speculation suggests that the theme is going to be somewhat familiar Surf and Turf, or nautical with Atlantis in the background.

Trivia

 * This episode name is a pun on the lost city 'Atlantis', which sank many centuries ago.
 * It may also have a Advent calendar like Wreck the Halls.
 * This episode may be the second Summer based episode (see Summer Pignic).

Resources
http://www.angrybirdsnest.com/angry-birds-seasons-piglantis-update-coming-soon/