Piglantis

Piglantis is the twelth season in Angry Birds Seasons. It was announced on gamecenter acheivements. It is hinted that the theme is going to be somewhat familiar Surf and Turf.

Trivia

 * This episode may take place underwater due to the fact that the name is a pun on Atlantis.
 * This episode may be the second Summer based episode.
 * This is the third episode to be leaked on gamecenter achievements.

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