It is, however, a decent-ish movie.
Transformers: Revenge of the Fallen lacks solid character development, good scriptwriting, and a coherent plot. And yet, for all it's flaws, there are still select moments where it's highly entertaining.
Revenge starts off with a brief prologue, followed by a great action scene that sets up the plot very well. In this story, Optimus Prime and his team of Autobots are working alongside NEST, a small U.S. military force led by Major Lennox, to eradicate the Decepticons from the face of the planet. When an ancient evil enemy, The Fallen, moves to destroy the Earth, Optimus Prime and the Autobots find themselves nearly powerless against this new Decepticon threat.
The film feels very much like the original animated series, as we get the same globe-spanning (and oft-ridiculous) sci-fi war adventures of the Transformers. It's a lot of fun, even if it comes off as convoluted and silly.
Mikaela (Megan Fox) has nothing to do in the movie. All of her important scenes only serve to advance the plot in a very small way, and it's obvious that the scriptwriters were just looking for something to do with her. Nearly all of the other secondary characters are similarly useless or annoying, with the notable exception of Major Lennox, who continues his role as the .
The two new "comic relief" characters, Skids and Mudflap, are extremely annoying. They're portrayed with a large number of racial stereotypes (which makes absolutely no sense), and serve to do nothing other than sit there and act like morons. They could have been completely taken out of the story and the film would have been better for it. It's not exaggerating to say that they're the worst part of the movie.
The rest of the Autobot cast is relatively ignored. Ironhide and Ratchet are given only a few lines in this film, and serve as background characters along with Arcee, Jolt, and Sideswipe. While this might seem sad, it ultimately works, as they really are mere soldiers in a war, and aren't extremely important characters anyway.
It's been said by some that a film is filled with depth, while a movie is superficial entertainment. By those definitions, Transformers: Revenge of the Fallen is a terrible film, but a so-so movie. Normally the battles and "fun" elements of the story would be enough to elevate the movie overall, but the bad stuff here is just so bad that it's hard to enjoy the whole.