Superman has a powerful new foe, as seen in Superman #7 (legacy #850). The Man of Steel released the seemingly unstoppable villain known as The Chained, unaware of his power, from Lex Luthor’s secret prison last issue. As The Chained seeks revenge on his jailer, not even the Super-family can stop him. But one hero has realized he has an inexplicable connection to the formidable entity. That family member also has his own unique connection to Luthor.
Source：https://www.cbr.com/superman-the-chained-lex-luthor-superboy-connection-dc/
