I hate the NFL's abuse of IP laws, but in this case it's completely understandable. Trademark holders are obligated to protect their trademarks or risk losing them. "super" and "bowl" are very generic words, so people instinctively think they should not be protected, but put them together and it's obviously a commercially powerful term. But even companies with trademarks that are unique (not generic words) have been careful to protect their trademarks with advertisements to "educate" the public. Most famously, Xerox would like to remind you that the first letter is capitalized and it's a brand of photocopier, not a verb. And Kleenex is a brand of tissue, not a substitute for the word "tissue."
Here's an interesting article: http://jcp.proscenia.net/publications/articles_mlr/walsh/Trademark_Battles.html
Hmm, I'm not sure I knew this—Velcro is a brand! And I just learned that Asprin was actually a trademark that wasn't protected, and now it's a generic word!
Didn't they actually try to copyright "The Big Game" a while back as well?
You're right (but it's "trademark" not "copyright"). That's why I hate those a-holes. Cal and Stanford also took great exception to their stupid plan, since they've been using it since 1902: http://www.sfgate.com/sports/article/NFL-marketers-want-Big-Game-trademark-Cal-2645219.php