This was one of my favorite threads on the old DC message boards. I'll mention the one thing I listed in that thread. In the Justice Leagues 5th week event, the Justice League of Arkham issue showed Batman breaking into Arkham Asylum and recruiting several villains for a mission, including... the Joker. Releasing the villains was ludicrous enough, but to release the Joker was especially ridiculous (considering the Joker killed Jason Todd, Sarah Essen, and others, and also crippled Batgirl).
Also silly is the idea of diet soda causing superhero aggression (as revealed in Justice League Europe after Giffen left). Was this some attempt to continue Giffen's humorous approach to the title? Because it does seem ridiculous.
