Top-US-Grossing Sci-Fi Titles Released in 2001

In 2029, an Air Force astronaut crash-lands on a mysterious planet where evolved, talking apes dominate a race of primitive humans.
The children of secret-agent parents must save them from danger.
real spies, only smaller
An eight year-old boy genius and his friends must rescue their parents after the adults are abducted by aliens.

The aliens stole our parents
A highly advanced robotic boy longs to become "real" so that he can regain the love of his human mother.
After receiving organ transplants from various animal donors, a man finds himself taking on the traits of those animals.
[9] K-PAX
PROT is a patient at a mental hospital who claims to be from a far away planet. His psychiatrist tries to help him, only to begin to doubt his own explanations.

He claims to be non human, but a visitor from another planet.
He chose me to communicate.
A rogue Multiverse agent goes on a manhunt for versions of himself, getting stronger with each kill. With only one version remaining, he races against the clock to finish him and become "The One."
a killer travels through parallel universes
A scientist makes a last stand on Earth with the help of a ragtag team of soldiers against an invasion of alien phantoms.
In 2176, a Martian police unit is sent to pick up a highly dangerous criminal at a remote mining post. Upon arrival, the cops find that the post has become a charnel house.
nothing is as it seems
we got a situation here 
a kind of possesion.
In the future, an alien race uses androids as bombs to attack Earth. A government weapons specialist is accused of being one such android and sets out to prove his innocence.
Its a genetic cyborg
trust me, do not believe what they tell you
A knight and his valet are plagued by a witch, and to repair the damage, they make use of the services of a wizard. However, something goes wrong and they are transported from the twelfth century to the year 2000.
What are we going to, they are trapped inside. 
[23] Metropolis
Kenichi and his uncle Shunsaku Ban must find the mystery behind robot girl Tima.
welcome to metropolis where robots have evolved. 
[26] Kairo
Two groups of people discover evidence that suggests spirits may be trying to invade the human world through the Internet.