Batman / Superman: World's Finest#10(2022)

Joker angrily slams down various newspapers showing off Superman, Batman and Boy Thunder in action as the clown believes he knows their real identities and demands him to tell them. David still claims that he doesn't, even as he's electrocuted. Joker does stop when the Key points out he's been at it for hours, the latter chastising David for attempting to use his powers while in his cage. Joker, then hits David with a variation of his Joker Gas, causing him to hallucinate seeing Superman, Batman, Robin and himself as monsters. In Gotham City, Superman tears through a hidden meth lab in search of David, but it's clear that the lead-lined buildings in Gotham is making it hard for him to find the boy. Batman tries to reassure Superman that he has the aid of the Teen Titans, the GCPD and himself and that he and Robin are looking into a lead through a clue left by the Key. Robin notes Superman is so angry and frustrated, Batman telling him that he's never handled anger very well, that he's mad at both the Joker and himself, telling Robin that he's feeling the same. He ultimately finds an identification mark on the item labeling it as a Lexcorp product. As he tells the heroes to meet up at a certain building, Superman snatches the two quickly and brings them there, where the other Titans are waiting. To their shock, inside the factory is a dimension of doors. Deep within the factory, David wakes up in front of the Key as the Joker cleans and primes a crowbar. The Key explains that, as a child, he dreamed of being free to expand his mind beyond what he had, fooled and frustrated by the myth of "only using 10% of your brain" and that he psychochemically altered himself physically and mentally to get where he is. He learned the Joker was also something of a chemist and agreed to giving him some of his chemicals, but he keeps moving the goalposts and today it's just wanton bloodshed. In a panic, David begs for his life, explaining that he isn't even from this universe. In shock, Key realizes that he might have been given the gift to unlocking the secret of the multiverse. In the dimension of doors, the Titans and Superman are having trouble finding the right door as they lead to various places. However, Batman points out that the Joker wears gloves, Key does not. Superman uses his microscopic vision to find the right door, allowing the heroes to bust in as the Joker is in the middle of beating David with the crowbar. Superman is able to free David, who warns him that the Key is escaping. However, when Superman follows, the door he tears open unleashes a strange beast. Robin and Aqualad give chase after the Joker when he's able to stun Wonder Girl, but David races ahead. As Superman, Speedy and Wonder Girl push the beast back into its door, Batman gets Kid Flash to rebuild the door Superman tore off. David, meanwhile, follows the Joker into a funhouse-like dimension. Furious, David blasts the funhouse apart, upsetting the Joker. David turns his powers on the clown, torturing him as Robin and Aqualad catch up, begging him to stop. As the furious David snaps at the Joker over how he got off on his torture, he vows to kill him if he ever saw him again... ...as we leap ahead twenty years into the future on Earth-22, revealing that David Sikela will become Magog and uphold his promise.