I agree with Heatstroke on the "superhero explosion," here in NA anyway. Not only is every movie and sequel a runaway hit (too many to list here), but other superhero games like Marvel Superheroes Online have launched recently and are going like gangbusters, besides CO and DCUO still being around (and DCUO at least is still getting a good amount of major updates).
There's room for CoX i23, there's room for a CoX 2 or 1.5 (a.k.a. APR), and there will be room for CoT by the time it ever launches too. Look how many pointy-eared fantasy MMOs there are out there! And you still see new ones coming every day! I find it hard to believe those players aren't the very same moviegoers watching all the new superhero movies too. Not to mention that even superhero movie-goers who have never played the games would likely want to try new superhero games.
There's a market there, but like any company selling something, you have to actively target and advertise to your market. You have to find them, and let them know you're there, and then nudge them into coming over to try your product. Incentive deals, ads, it's been done so often because it works, and that's for every business, not just the ones in the gaming industry.