24/11/2022
In the comic Superman: Kal-El Returns, Superman and Batman are imprisoned together - For those who don't understand Kryptonian, Kal-El (the original Clark Kent Superman) has been away from Metropolis and his family for the past year on a space mission, leaving his son Jon Kent as Earth's top Superman. Now, on November 29, Kal-El will make his way back to Earth in the appropriately named Superman: Kal-El Returns #1 one-shot, which also includes artwork by Max Raynor, Dean Haspiel, Jack Herbert, and Reilly Brown and storylines by writers Mark Waid, Sina Grace, Alex Segura, and Marv Wolfman. ...
https://thegreatly.com/in-the-comic-superman-and-batman-are-imprisoned-together/
In the absence of Kal EL Superman and Batman reunite but with a twist as they find out that they are trapped inside a comic by the mysterious Evil Doom Patrol villain Mr. Nobody.