Gears is a proven franchise. Only the thought that it will be bigger and "more badass" is shifting the expectations and the sales of course. Don't forget that it hasn't drop its price from day one. Almost 2 years later a new package is under discussion, and we haven't seen anything yet. Put a little hype, like MS knows how to do it, and there we are. 2000000 on week 1, easily.
On the other hand we have a game that the first incarnation was a "meh" on the single player campaign ("Βlack" was easily more next gen than RFoM), it was the only choise for a PS3 early adopter, and it was bundled in many places all over the world. As a multi player was fun and that's what I think will count in R2 success. I saw the new footage today, nothing impressive there. But the 60 player multi is really interesting. Conclusions are yours to make.
