It's simple and I'm just re-iterating it, but Luigi's Mansion 2 is a sequel to a relatively old game, while the others are a spin-off from a series that has several games out already this gen. That's counting the PSP games for God of War.
I'm not. I love God of War. One of my favorite franchises, to tell the truth. Still, Ascension proved to be more than disappointing, merely reflecting the quality of the portable episodes. The fighting engine got gimped in favor of the Multiplayer, and the Single Player ended up being everything but memorable.
I take it no one here has looked at the NPD numbers for this month. Turns out GoWA did outsell Luigi's Mansion. LM ranked 6th, behind Bioshock, Tomb Raider, GoWJ, GoWA and BLOPS2. I also threw up a little when The Walking Dead cracked the top 10 at number 9.