Leota's long introduction to her teammates, was improvised by Danielle Brooks.
Peacemaker expressed desire for a jetpack, like the character first used in Kingdom Come.
Batman gets a quick mention by August Smith's neighbor and the Wayne Foundation logo appears on the forged journal that Leota Adebayo is meant to plant in Peacemaker's trailer. Interestingly enough, the logo looks less like the one seen in any of Ben Affleck's appearances as the Caped Crusader and more like the one from Christian Bale's stint as the Dark Knight.
Many fans noticed a picture on Peacemaker's dart board. They realized that the figure depicted there was none other than Eclipso, DC's incarnation of the God of Wrath and the Angel of Vengeance.
Peacemaker's house number is 1138. That number recurs in the works of George Lucas, most clearly as THX 1138 (1971) and in Star Wars A New Hope (1977) when Luke, on the Death Star, says he has a prisoner transfer from cell block 1138.