The projected sales of those 4 games combined are 11.9 million. Their total projected sales for 2012 is 20 million.
I wonder if there's yet to be announced titles for this year which is expected to do really well. Or if they have a ton of other games which adds up to that (like the various HD collections they're releasing this year, or misc releases like SFxT on PC).
Despite console game sales are heavily frontloaded, many of Capcom's older games will still sell throughout the course of the year. I expect Resident Evil games in general to sell extremely well up to the launch fo RE6.
And then, as you mentioned, there might be something in the works that they haven't announced yet.