i think gears of war 2 will sell either the same as halo 2 or more only because its the biggest title for the 360 this year. it will sell more because more people have a 360.the first sold 5 mill and their were hardly any people with 360s. I know all my friends in the uk prefer gears of war to halo because halo is not as gritty and dark as gears (THE NEXT GEN CURSE EVERYGAME GOING IS DARK OR BROWN) If gears gets the right sort of advertisment just as big as halo 3 then it will beat halo 2 and sell about 8-9 mill lifetime. 2MILL FIRST WEEK. It will sell more then any ps3 title this year i am sure about that

I agree with your logic but think GOW2 is much more polished to be honest GOW went out with a a ot of decent ideas but notfully baked.  Even cliff in an interview was shocked how much it was played online it was added but not fully fleshed out.  I think this one is going to be HUGE.  Everyone of my firends (25+) is getting it the last time this happened was Halo 3 which sold 8 million.  Which personally was a HUGE disapointment in my eyes.  But Halo 2 was the pinnacle as I feel GOW2.  They had more time for the story and had all the multiplayer experience to fully flesh that out

 what he said.

hopefully, i love Gears 1 and Gears 2 looks like its gonna be kick ass (Ive ordered the limited edition, so ill be using my golden lancer )

The games that should be played the most often aren't the ones that are played the most.  The phenomanal success of Gears1 is what's going to beat Gears2.  On top of the logical stuff in my above posts, I also want to remind you that Gears has some of the best legs on 360.   Gears2 will have a huge holiday, 3-4 million but Gears1 being a budget title this holiday plus all those 199-299 360's that are going to fly off of shelves (mass market and value gamers) means it will see a boost in the holidays.

This really isn't a knock at Gears 2.  When I said "...I will not be buying Gears 2." it not about the quality of Gears 2, it's about all the competition the new title will be facing.  There are a bunch of other games I want before it.

When Gears 1 came out there were no other proven franchises on 360 selling in the multimillions yet (except Oblivion & COD2-3).  There was Saints Row (1.5 mil), Dead Rising, Rainbow Six, etc.  Great games, that still sell well, also.

Now add to that the 2007-2008 releases, Halo 3, GTAIV, Fable 2, all the JRPGs, all the other decent niche shooters, Mass Effect, the list goes on and on  for the great games of 07-08... many of which will also be budget titles which will attract the new 199 value buyers.

If it makes you feel better, I think it will out sell every PS3 holiday release (that I can think of) except maybe Little Big Planet (which I can honestly say that I have no idea how well that is going to sell).