All the movies it ripped off
I liked the movie, since I like all movies based on the future that are done somewhat well. But just off the top of my head here's a list of the many movies it obviously ripped off. I'm sure there's more, but as you can see, it's easy to see the writers borrowed a lot!
1) The Matrix & Matrix Revolutions
Aerial battle, bullet-time kung fu fight, battle where two guys have equal abilities and hit each other at the same time, the squiddies attacking in the same freaking formation (AND guys in mobile suits fighting them off).
2) Star Trek
The cube like Borg ship.
3) Mr. & Mrs. Smith
The last gun battle where Brad and Angelina fight side by side shooting from all angles with their backs against each other and from the front.
4) Resident Evil Apocalypse
The mob of zombies running over the police at the city limits.
5) Final Fantasy Spirits Within
The opening scene inside an airship looked awfully familiar.
6) Terminator 3
Trying to keep a mechanical door from closing and getting ripped apart.
7) David Lynch's Rabbits
Brialeos' head looks like the same rabbits from that creepy short, c'mon.
8) Ghost In the Shell
People getting hacked and losing control of their actions. They even ripped themselves off!!
9) Appleseed
Cyborgs and clones in the future. Oh wait...