Here’s the description and/or build-up they used:
Our ninja t‑shirt!! The greatest movie parody t‑shirt on the internet! You may have seen t‑shirts that are based around movies but, as you know, we at Bang Bang T‑shirts want to change the world so we are making movies that are based around tee shirts!!! Forget the new Indiana Jones in 2008, this is going to be the one to watch:
The film of 2008!!!!