In the closing credits’ stinger, Superman (Geralt of Rivia) tells Black Adam (Hercules), “It’s been a while since anyone’s made the world so nervous. Black Adam, we need to talk.” Most viewers think this is a reference to how the people of Earth 138 were freaking out about Superman (in Man of Steel & Batman v Superman: Dawn of Justice). Actually, he’s talking about James Gunn and his new DCEU.
Batman asks Superman, “Do you bleed?” This is a subtle nod to the fact that Kryptonian males MENstruate. This line of inquiry is simply Batman trying to get more information on Kryptonian physiology because he is unsure if Superman has gone through “the change.”
Batman did NOT ask Wonder Woman because he didn’t want to get kicked in the pee pee.