I'm sorry but, I just can't care for prequel stuff like this. Why do I care about Gotham City? Because Batman, the Joker, Two-Face, and many others are running amock in it. So cut all that out and what am I left with? Boring crime drama. Don't get me wrong it could be GOOD crime drama if written well, directed properly, and features talented actors.
BUT that dosen't feature any of the stuff I like about the setting of Gotham City! There's no "super" aspect to it! IT's the same reason I couldn't give a crap about Smallville. It was Superman reduced to teen drama with little super power display and no colorful costumes. Because no super powers and no costumes are much easier to film and easy on production budgets.
The whole idea of "See what things were like before the super heroes showed up!" ,but... The super heroes are what I love! That's what I want! I love the stuff I love. To further illustrate my thoughts on this, I present you the following clip from one of my favorite comedians Mr. Patton Oswalt. In the clip, Patton gives his thoughts on the making of the Star Wars prequels and why prequels themselves can be down right boring.
My thoughts in a nutshell.