Whatever thoughts or expectations you had for the 2014 Teenage Mutant Ninja Turtles film, we are sure you were nostalgic about at least one previous incarnation of the Ninja Turtles franchise.

Whether you were into the original comics, the '80s cartoon, the trading cards, or the live-action movies, we bet you don't know all seven of these obscure facts about Leonardo, Donatello, Rafael, Michelangelo and the entertainment empire they spawned.

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