One of my Favorite DC Movies and Character. Shame DC haven't done much to the same standard as this with the Character. The only real Things I can think off are.
Lost Days (Has some bad bits is you have read it you know the part I'm on about)
Red Hood and The outlaws Rebirth Volume 1: Dark Trinity and Issue 26 or Red Hood Outlaw Part 1.
other then that His Video Game and Movie adaptations have been up and down. Mostly down. Even the Comic had some patchier bits with new 52.
Its a Same when Fan films seem to get the charter more then the componey that created him but the is a lot of that this days.
But Id give the movie a solid 4.5 out of 5. Just wish it was longer and some bits weren't cut from the comic but Most of the changes were good