Well, I've heard that a nest (possibly with the eggs in it) will be placed at the top of the tower. In this case, I'm gonna start placing a bet to what the theme and ride experience will be!:
If the egg's nest is gonna be at the top of the tower, then the theme might be a Bad Piggies sort of thing, where the car will be themed around the pigs' latest vehicle to get the eggs! Of course, once you reach the top, the birds start to get a little mad! The sound effects playing will consist of (say) the pigs sniggering at times, followed by the slowly oncoming sound of the birds enraging! This will probably be followed by the familiar sound of the catapult being pulled back from speakers on ground level, then the sound of a random bird (varies between rides) launching into the air, then a speaker on top of the tower will play the sound of smashing wood the moment the brake goes off for the drop!
...*pant...pant...pant*