DC Universe Last Will and Testament is in our library April 2.
I consider it Brad Meltzer best work, far superior to his Identity Crisis, which it refers to. Judas Contract is important here too.
Read it to see what some Heroes do, perform rituals, go to a priest, visit your parents or perform one last patrol.
The response of Green Lantern to the forecoming battle, where all the other Heroes think they will die, goes to his core as a test pilot.
I would probably read stories like this.
What would you do?