It will sell more than Demon's Souls simply because it is multi-plat.
Prediction:
PS3:
NA: 100k - 150k LT: 500k- 750k
JA: 75k - 125k LT: 200k - 300k
Others: 50k - 100k LT: 250k - 350k
First week total: 225k - 375k
Lifetime: 950k - 1.4m
360:
NA: 50k - 100k LT: 400k - 600k
Others: 50k - 100k LT: 200k - 300k
First week total: 100k - 200k
Lifetime: 600k - 900k
Overall
First week Total: 325k- 575k
Lifetime Total: 1.55m - 2.3m








