Re: Fighting, Tatics, and new gadgets of the New Batman
Fear should always be the main tactic (Best example being in Batman Begins when Batman hid himself vs. 7 of Falcone's men. They all became scared ****less when he solo'd some of them and hid back into the dark).
As for fighting, I'd stick to adapting from some of our real world fighting techniques.
Technology. Go wild!