These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fanon Discontinuity: Even his fans have trouble with the Batman/Spawn crossover being part of the Dark Knight Universe. His less die hard fans have apply this to either All-Star Batman, The Dark Knight Strikes Again, or both.