DC's captain Marvel is also known as 'Shazam' because of a legal dispute.
Here's some interesting DC trivia for you superhero fans! Because of a legal dispute, DC's Captain Marvel is also known as "Shazam." When Marvel learned that DC was planning to resurrect an old hero named "Captain Marvel," they swooped in with a copyright for their own "Captain Marvel" before DC could complete all of the paperwork. That's when Detective Comics decided to rename its hero "Shazam."
The phrase "X-Files" refers to all of the conspiracy theory fodder that the FBI is secretly working on.