Fics like In another universe.

Batman finds himself in another universe with an entirely different Superman.

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2. In Love With Justice by PlotsOfCoffee (Batman - All Media Types, Justice League - All Media Types, more)
3. moving in stereo by TheResurrectionist (Batman - All Media Types, Superman - All Media Types)
4. Sometimes darkness can show you the light by Mawiiish (Superman - All Media Types, Batman - All Media Types)
5. the privilege of becoming mine by nepobebe (Superman - All Media Types, Batman - All Media Types)
6. blind vision by TheResurrectionist (Superman - All Media Types)
7. buy back the secrets by sundiscus (Batman - All Media Types, Young Justice - All Media Types)
8. Dumpster Diving for Treasure by Clovrtree (Spider-Man (Tom Holland Movies), Batman - All Media Types)
9. #Superbat by lostinreeverie (DCU (Comics), Superman - All Media Types, more)
10. Spiderhead by emmacortana (Marvel Cinematic Universe, Spider-Man - All Media Types, more)
11. isostatic by mediant (Superman - All Media Types, Batman - All Media Types)
12. His Kids by Hejsan_Svejsan_Booo (Batman - All Media Types, Justice League - All Media Types, more)
13. Cheap Daycare (Batman - All Media Types, Superman - All Media Types)
14. of crime lords and literature by adelfie (Batman - All Media Types)
15. Existential Crisis Mode by LuciaInTheSky (Batman - All Media Types, Spider-Man - All Media Types, more)
16. Send to All by cairosene (Batman - All Media Types)
17. "It's just down the hall…" by dyn42ty (Superman - All Media Types, Batman - All Media Types)
18. productivity measures by pomeloquat (Superman - All Media Types, Batman - All Media Types)
19. He’s only human by hyonin (Batman v Superman: Dawn of Justice, Superman - All Media Types, more)
20. Summer, summer, summertime~ by hyonin (Batman - All Media Types, Superman - All Media Types)