here is a list of DC movies released up until that time:
1. Superman (1978)
2. Superman II (1980)
3. Swamp Thing (1982)
4. Superman III (1983)
5. Supergirl (1984)
6. Superman IV: The Quest for Peace (1987)
7. Batman (1989)
8. The Return of Swamp Thing (1989)
9. Batman Returns (1992)
10. Batman: Mask of the Phantasm (1993)
11. Batman Forever (1995)
12. Batman & Robin (1997)
13. Steel (1997)
14. Catwoman (2004)
15. Batman Begins (2005)
16. Constantine (2005)
17. Superman Returns (2006)
18. The Dark Knight (2008)
19. Watchmen (2009)
20. Green Lantern (2011)
21. The Dark Knight Rises (2012)
22. Man of Steel (2013)
23. Batman v Superman: Dawn of Justice (2016)
24. Suicide Squad (2016)
25. Wonder Woman (2017)
26. Justice League (2017)
27. Aquaman (2018)
28. Shazam! (2019)
29. Joker (2019)
30. Birds of Prey (2020)
31. Wonder Woman 1984 (2020)
32. Zack Snyder's Justice League (2021)
33. The Suicide Squad (2021)
Please note that there might have been more DC movies released after September 2021, so I recommend checking up-to-date sources for the latest information on DC movies.
