Depends. Resistance is in a sticky place I think. They changed the game too much and got a lot of grumbling, but now they can't be sure going back to the old model is the right choice either. I think it will sell find but they need to:
1 - sort out the SP/gameplay for consistency
2 - improve the MP - more doesn't automatically mean better
3 - leverage the coop which was great and pretty much universally praised.
If they pull it off it'll sell more than R2 but less than R1 unless bundled, which it won't be. If not they could sell less than R2.
KZ3 I think will sell fine, although they need to improve the SP a bit in line with general complaints, not go overboard with the heavy feel (I like it and I don't want everything to be a CoD floating game but it must remain fun) and further polish the MP with additional elements.
I would expect a 'more of the same' KZ3 to sell maybe 5% to 10% more. If they add enough new stuff and get both a good SP and more great MP in place then I could see more like 20% increase on KZ2.
Try to be reasonable... its easier than you think...
