After being almost burnt to the stake of suggesting Sam Worthington as Cable. Here's my peace offering to you guys- Michael Biehn as Nate Summers.
I must admit he does have the bearing to look the part.
My edits on this image:
Of course the mug of Biehn. Hair was a bit tough, gave him the star shape scar on his right eye and glowy eye on the left. Body I got from a trooper, I just adjusted the color scheme "which funnily enough" resembles that of CBM. Found an interesting looking left arm, modified it to make it metallic. Attached a slight "BFG" on his back. I then looked for a sorry looking city for background to double as Cable's Future.
So, is this the guy you want to play as the spawn of Cyclops?