Any resemblance to Transformers: Revenge of the Fallen is entirely intentional:
In this present day prequel, the robot invaders attack the Earth, forcing a small band of humans to seek refuge below the surface of the planet.
Prequel? Prequel to what? Why, just-plain Transmorphers, from 2007, which it was devoutly hoped you would confuse with Transformers, coincidentally released that same year:
A race of alien robots has conquered the Earth and forced humanity underground. After three hundred years of domination, a small group of humans develop a plan to defeat the mechanical invaders in the ultimate battle between man and machine.
These films are, of course, coming to us through the auspices of The Asylum, which also recently gave us the cheapie Sherlock Holmes knockoff that comes complete with dinosaurs and steampunk power armor.