I would guess not as well. Halo 2 was a massive success whose online multiplayer was king of the hill for innumerable months; they could have put two stones in a box and called it Halo 3 and sold millions. Fortunately, they did not, at least not IMO, I thoroughly enjoyed Halo 3.
Gears was a huge success but I think still building it's fanbase. I think Gears 3, if Gears 2 delivers on its promises, may come closer (though not sure if it would surpass it...Halo 3 was a phenomenon).








