Mockbuster
Film made to exploit another's publicity / From Wikipedia, the free encyclopedia
Not to be confused with Twin films.
A mockbuster (also known as knockbuster or drafting opportunity[1]) is a film created to exploit the publicity of another major motion picture with a similar title or subject. Mockbusters are often made with a low budget and quick production to maximize profits. "Mockbuster" is a portmanteau of the words "mock" and "blockbuster".