"The ultimate threat. The greatest battle. The perfect team."
Batman and Superman: Battle of the Super Sons - Easter Eggs & Hidden Details
Easter Eggs
The 'One Punch' Knockout
During a fight, Jon manages to knock a mind-controlled Batman out cold with a single blow. He exclaims his surprise at doing it "with one punch". This is a direct, hilarious homage to the legendary moment in Justice League International where Batman knocked out the obnoxious Green Lantern, Guy Gardner, with one punch.
The Smallville Crows
Jon's junior baseball team is named the Smallville Crows. This is a recurring piece of Superman lore, notably serving as the high school mascot for Clark Kent in the live-action television series Smallville.
Teen Titans Rejection
When Damian attempts to take out Starro, he opens a hangar door to find the possessed Teen Titans (including Wonder Girl and Martian Manhunter). Earlier, it is mentioned the Titans voted against making Damian a member. This references Damian's historically rocky and abrasive relationship with the Teen Titans in the comic books.
Truth, Justice, and the American Way
Superman proudly uses his classic catchphrase, "Truth, Justice, and the American Way," which has been largely phased out or altered in modern DC comic books and films in favor of a more global perspective.