Forbes - So, just a few points to make here.
First, it seems odd that Gamasutra at once claims that the decline appears to be real and points out that the launch month comparison is flawed.
Second, we have far too few data points here to note a trend. The fact is, Call of Duty games are selling millions of units every year, and Black Ops 2 made over $1 billion in sales in its first 15 days on the market. Unless success is only measured by each game outdoing the next infinitely then I’d say Call of Duty remains very much a successful franchise.