Sometimes you can tell the complexity of a case merely by looking at the caption. Here's an example.
Check out this part of the (lengthy) caption:
Argued and Submitted
September 12, 2005—San Francisco, California
Submission Withdrawn September 14, 2005
Resubmitted March 16, 2007
Filed March 16, 2007
Amended September 4, 2007
Second Amendment March 25, 2008
Finishing up two and a half years after oral argument. Sort of gives you a sense of how not-so-easy the case is.
And, if you don't believe me, you can read the remaining eighty two pages of single-spaced text to confirm this impression. Go ahead. I dare you.