I suppose it only makes sense for a movie called Monster Trucks to be a movie about actual monster trucks. Via our sibling site I Watch Stuff:

Nearly three years since announcing their confounding plan to make a movie called Monster Trucks, Paramount has released the first trailer for the film, finally revealing how exactly they turned monster trucks into a movie. Turns out, by going extremely literal with the name!

Source: Geekologie – ‘Monster Trucks’ Is A Real Movie Based On Monster Trucks