Does anyone know how that theory goes

I'm still not sure if Rothman and the organization he works under are aliens, but I would have to re-watch the movie again.

Basically, this movie can be seen as an allegory to not only this movie and the previous Texas Chainsaw Massacre sequels, but as an allegory to horror films in general that were coming out in the late 80s, early 90s; Hell, probably even to this day.

Rothman can be interpreted to be the producer who comes in every now and then to see how his investment is going.

Vilmer can be seen as the director who is way over his head, and has lost control of everything, even though he is the one in charge.

Darla can be seen as the director's assistant who is attempting to help Vilmer keep things under control, while simultaneously trying to steer things her way and how she wants things done, and she accomplishes this by sleeping with the director.

W.E. can be seen as the pretentious smart-ass second assistant director of the crew who likes to annoy people with his 'education', about how he would run things, which is why he and the first AD, Darla, get into fights. Also, Second Assistant Directors work with the cast a lot, which leads to Leatherface.

Leatherface is the star who is over-top (yelling and screaming), and acts like he's hot shit with his woman outfit, but is really cold piss. Leatherface, the star, gets into a lot of fights with the second assistant director, W.E., which is why W.E. abuses him.

And lastly, we have Jenny, the typical horror movie lone survivor, who in this film acts as the audience. What happens to her happens to us. No matter how hard she tries to leave the movie, the director keeps finding a way to bring her back in. The audience stands up in the end, slaps the director, declares everything to be bullshit, and finally yells at the over-the-top star to sit the fuck down and shut up.