Now that would be a better queston.

this is like comparing a sperm to an ultrasound picture.

that's a classic indeed...but there's still room for improvement...here is my trump card:

Dude your asking if a Halo game will be beaten by another shooter? LOL. Halo 3 is gonna do over 10mill what does that tell you?

Blah. :P

They could re-package the Atari ET game and call it Halo 4 and it would outsell Killzone 2.

Despite Halo 3 not living up to everybodys expectations (i personally love it) the Halo trilogy is a LEGENDARY series, Now lets look back to killzone 1 shall we? Killzone 1 got a PATHETIC overall metacritic score of 71% and that was only the 1st killzone game, killzone 2 is looking better BUT didn't people say killzone 1 was gonna be amazing and look what happened to that lol, the bottom line is that the Halo franchise is one of the most popular franchises on the planet today...... Killzone on the other hand will NEVER be a legendary series because they got it all wrong from the start.... even if killzone 2 does turn out to be good its not gonna make it a popular franchise, you have to get it right first time and bungie got it SPOT ON with halo 1, due to Halo 1 been such a good game and such a popular game it has etched Halos name in stone with regards to its LEGACY, killzone has no LEGACY nor any LEGENDARY status like Halo does...... bottom line