Just completed the game, was pretty cool, the combo making with different constructs where the best. Who doesn't like shooting people with a gattling gun then throwing a jet at your enemies :p
It's a stand alone story not based on the curent movie, but does follow the movie designs of the characters and gl is voiced by ryan reynolds from the movie.
And for you ps3 trophy hunter's you get all these reasonably easy unless you can't complete the game on hard difficulty.
Check it out, not as bad as some reviews have stated out there.