Originally Posted by Oswald
But the demons, gods and extraterrestrials provide nothing to the Batman mythos, they're fine to Superman or others fantastic heroes, but Batman is a human and his enemies and the menaces he confronts are also human. For me Batman against a fantastic creature has so much sense as Superman against the Joker or another human psychopath: that is, nothing.
It's true there has been fantastic characters and plots along Batman's story, I'm not gonna deny it, but, in the base, they're dispensable in the path of Bruce Wayne.
They do nothing to really further Bruce's evolution. They're always there as a villain of the week (the monsters, the robotic villains), or some experimental cross-over where Batman has a chance to fight aliens or gods. The latter is usually an enemy to another Justice League member.