The problem is that they are ... too good. This might sound stupid but I mean it sincerely. No part of the Zsasz, Deadshot, Mad Hatter etc. was any less exciting and engaging than the arguably GOTY worthy main story missions. These really should not have been considered "supplemental" and potentially skipped over. Makes no difference to me and other obsessive side-quest doers, but to think that people are going to complain about the game being short without doing the sidequests that obviously were meant to be a MAJOR component of the content kind of pisses me off. IMO, only collecting Riddler trophies should have been supplementary (which is plenty of sidequest in and of itself), the other stuff was just too good to keep as supplemental. What do you guys think?