For this to be true Resistance will need to improve quite a lot very rapidly and Gears will have to idle for a bit. Its not out of the question that Resistance could be on the same level as Gears for a round 2 but to say that it will compete with it in terms of sales seems a bit optimistic. Gears was huge last time and will most likely sell fantastically even if its not as good as the previous much like Halo 3.
