*MAJOR SPOILER FROM STORM OF SWORDS BELOW, DO NOT READ UNLESS YOU'VE FINISHED THE BOOK
I agree. I don't think that Storm of Swords is referencing ONE particular event in the books, so much as the fact that if you look at the book in it's entirety there were a lot of violent scenes, and a lot of deaths, many of which were in part due to deaths from combat of some sort. There are many examples that would back this up.
I think that AFFC's title is good for it's own book. If you think about it, it's the aftermath of all of the previous book's events. The aftermath of everything has left a feast for those who wish to capitalize on it.