A new rumor regarding Man of Steel 2 is currently making the rounds online, suggesting that Supergirl will be introduced to the DC Extended Universe via the sequel film.
“The sequel to Man of Steel has been developing in secret.
For now, this should be treated as extreme speculation, but we will keep an eye out for future developments regarding Man of Steel 2.
Brainiac will be the villain and Supergirl will be introduced to the DCEU.”