This crossover is 'The Resurrection of Ra's Al Ghul'. Published in 2007, a time when Carlos Tevez was only hated by one half of Manchester (ahem).
Haven't read this yet, and up to the point where I picked up the Grant Morrison written Part 4, I wasn't even aware that Ra's had been killed. Oh well, I'm sure it will become all very clear when I get (and read) Every damn Batman comic ever published.
Prelude- Batman #670- prelude
Part 1- Robin #168- part 1
Part 2- Nightwing #138
Part 3- Detective Comics #838
Part 4- Batman #671
Part 5- Robin #169
Part 6- Nightwing #139
Part 7- Detective Comics #840
Epilogue- Detective Comics #841
