Man-Bat vs. the Lizard or Man-Spider
I don't really think Man-Spider has any reason to be fighting Man-Bat except for the fact that they both have "man" in the beginning of their names. But Lizard and Man-Bat both are scientist that were working on similar experiments, and sometimes they both retain their knowlege when they transform. Lizard is faster, but Man-Bat has that sonic screem.