16. Bob Kane Was Here
The first Batman movie was probably the best at channeling the Gothic spirit of the comics (thanks to the occasionally wayward creative genius of Tim Burton) and there's a very early homage to the source that is even more overt. When Alexander Knox is heckled by his disbelieving colleagues, an artist hands him a drawing of the bat-man, in order to compound his public shaming. The comical caricature is a funny touch, which could actually distract from the Easter Egg signature of Bob Kane in the bottom left corner of the sheet - the creator of Batman and his universe.