Is going to do it better than MGS3 (sales and game) but is not going to be huge, mostly for two reasons:
1) Price, a lot of people played the last 2 or 3 games, but very few of them paid full retail price just for the game (A lot played a downloaded iso), thats why I think some of them are going to buy the game (MSG3 sales number) and some the bundle, but most of them are going to wait... Edit:(What I'ma saying is: If they don't paid for the last game, are they going to bought a new PS3 just for the new game???)
2) Genre, is not a shooter, now is kinda a niche title (great, average or meh, your choice), but it doesn't appeal to the mass market...