In the Luther Arkwright thread, Slop101 made the point that there was a knee jerk reaction to dismiss the sequel, Heart of Empire.
This reminded me of Brian Cronin's point in the best Batman artist articles that DKSA is actually a very good work that suffers because it didn't compare to the first. Grant Morrison makes a similar point about that book.
Now, I think it is important to say that it is perfectly legitimate to dislike DKSA or HOE.
But what sequels or later stories that revisit the same ground as classics do you believe are actually good works but have suffered bad press because of what they followed?