Alfred Pennyworth sequel, "Injustice 2", Zsasz is killed in year one by Damian, leaving Alfred's death in the continuity unexplained, but his takedown of Superman is referenced by Harley Quinn. In the prequel comic to "Injustice 2" Ra's enacts a plan to bring the world balance and has Damian kidnap Alfred's corpse and resurrects him through the Lazarus Pit to use as a hostage against Batman. Due to Alfred being dead for a long time, he is brought back in a zombie-like state and requires constant medical attention from Damian. Upon recovering, around the same time he witnessed Batman and Damian attempt
Matthew Butler and Matthew Calbraith Perry, for whom Matthew Calbraith Butler is named. His father, William Butler, Jr., was a Congressman beginning in 1841. His uncle Andrew Butler was a U.S. Senator from South Carolina and uncle Pierce Mason Butler was Governor of South Carolina. One of Matthew Butler's first cousins was Congressman Preston Brooks, who assaulted Senator Charles Sumner in 1856 on the floor of the U.S. Senate with a cane. He said it was because Sumner had insulted Senator Andrew Butler, at whose home Matthew lived as a young man. Two of Butler's first cousins twice removed were James Bonham