Angry Birds Seasons/Unused Content

Angry Birds Seasons is the second Angry Birds game to be released and it got a lot of unused content as seen below:

Scientist Bubbles
An unseen Bird Wear appears in the preview for the Bird Wears. It's the Scientist Bubbles costume. It isn't obtainable in the game by any sort. It could possible be a beta design for Bubbles's Hulk Costume.