It's going to have:

-All Episodes up to "Jurassic Pork", plus the unused "Angry Birds Land" Episode with 45 new levels, the cancelled third part for "Red's Mighty Feathers" with water physics and 15 new levels, and there is gonna be a whole new episode to celebrate the games birthdays from the 8th birthday to the 14th birthday. Birthday 10 will have 30 community made levels that you will be allowed to submit.

-Achievements for every Boss, 3 starring episodes, getting big scores, and all that.

-Many settings with customisation like allowing you to have classic episode cards, chrome pigs and reloaded bird designs all at the same time and much more!!!

-A cheat code system with many silly and useful settings

-Leaderboards

-The Mighty League

-A change list and many more...

Many of these things will be added after release.