From my 3-star review posted on Amazon:

I expected better, especially from the writers. It’s not bad, but I don’t have any desire to see it again.

It’s essentially The Avengers, but with robots, crude humor, and many fighting scenes that seemed to go on longer than they should. It’s a good movie if you just want to watch a somewhat-mindless action flick for 2.5 hours, or if you’re a bigger fan of the cartoon than I was as a kid.