For a bit of a flashback to ten years ago, a copy of the original Animated story bible/treatment has surfaced, and has been posted up at the Allspark as a 60 page PDF (3.7Mb).

Most of the information that is different to the end product of the Animated series has been revealed before, or used by IDW, but there is a fair bit in there that might be news to many... particularly those who are new since Animated came out.
And as with any early story treatment, it's like an original proposal or prototype, so a fair bit gets changed before the project sees production.

Worth a read if you have the spare time, like lunchbreaks or the bus/train into work.