One of Batman's writers answers the question of whether Batman is capable of extending forgiveness to Joe Chill for murdering ...

there is one potential death that has had everyone unsettled or angry, the idea this is how Arkham Batman, whom we’ve played as over the course of three games, will meet his end in this universe.

They also revealed one particularly revealing cover for Batman #159, which shows an angry Jason Todd armed with twin SMGs as Joker and Batman are lying on the ground surrounded by bullet casings.