So many to choose from...
H.G Wells' War of the Worlds, for obvious reasons. *Points at username and avatar*
Marvel, I would like to see super-powered people and machines fighting everywhere.
DC, same reasons as Marvel.
Shadowrun, I want to see how much of myself I can replace without turning into a cyber-zombie.
Warhammer 40k, becuase death is cheap and also becuase TECHMARINES!
Matrix, becuase machines.
Terminator, becuase machines.
And Doctor Who, becuase CYBERMEN!
...Yeah, that's pretty much it.
EDIT: Oh, and Star Wars. General Grevious is awesome.