Enh. Morrison has stated his basic intent is to produce 5 HCs/TPBs which can be read by themselves, with only a minimal knowledge of Batman - e.g., he fights the Joker, he has a companion named Robin, his parents were gunned down, etc.
I approach it as if I were that ideal reader who had barely read any Batman comics before and was only going to read the Morrison works, and it's generally a more satisfactory read.