This is not only the best comic book related game ever, its easily one of the best action games ever made, at least this generation, if not all-time. Its that damn good IMO. Sharp engaging story, killer gameplay, and great technically. Its the whole package.
I am stunned by how good it is. This is a must play unless you are lame and hate Batman.
The scarecrow sequence early on in the game knocked my f'in socks off. The bit before you meet him (you'll know its coming if you know the characters), if you have surround sound turn it up, holy shit!