There have been numerous instances where Warner Bros. nearly adapted Brainiac for the movies, most notably Richard Donner's original vision for Superman III (which itself was adapted to the comics).

Ask almost any DC Comics fan and they'll tell you that Batman is the publisher's smartest superhero... and yet it turns out ...

The theatrical production has unexpected consequences. Against Lena’s original intentions to expose Brainiac’s villainous nature, the play ends up humanizing him too much. More significantly ...