Piglantis

Piglantis is the twelfth season in Angry Birds Seasons. 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 fabled city 'Atlantis'.
 * This episode may be the second Summer based episode (see Summer Pignic).
 * This episode may be the fourth Advent-style episode (see Season's Greedings, Summer Pignic and Wreck the Halls).

Like Angry Birds, Angry Birds Rio and Angry Birds Space, the game will have the credits in the middle of the screen and the background of what the hompage was. It'l also have the other font. When you pause a certain level, the menu would be black. When you fail the level, the failure box will be the same as Angry Birds's but also with an object which fits in with the theme of the season. When you complete a level, the design and sound effects will be the same as Angry Birds level completion. Also (this is not on Angry Birds Rio and Angry Birds Space), when all the pigs disappear, in the bottom-right corner, an arrow will appear.

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