All solutions are from my playthrough and experiences may change, if your playthrough does not match comment why and I will edit
*** Spoiler - click to reveal ***
Starting off the finale episode Joker starts by inviting Bruce to sometime he has planned for the agency. Have a quick cover-to-cover section if you defended John on the bridge
Confront the corrupt agents with QTE's, when all hope is lost a friend comes in and saves the day. The next section is QTE's with what is now the most badass fight scene in the game
Dialog after
More QTE's as the plot progresses.
Have a choice of saving Harrison or Saving Willy
Have a choice of driving the car or dropping the smokestack
After the last of the confrontation, ask Alfred for a patch up
Chapter over