According to the search results, the next movie in the DC Extended Universe (DCEU) after "Batman v Superman: Dawn of Justice" is "Suicide Squad". Here is the chronological order of the DCEU movies:

1. Wonder Woman
2. Wonder Woman 1984
3. Man of Steel
4. Batman v Superman: Dawn of Justice
5. Suicide Squad
6. Justice League / Zack Snyder’s Justice League
7. Aquaman
8. Shazam!
9. Birds of Prey
10. Wonder Woman 1984
11. Zack Snyder’s Justice League
12. The Suicide Squad
13. Black Adam
14. Shazam! Fury of the Gods
15. The Flash

Its worth noting that "The Batman" is not part of the DCEU and takes place in a separate universe.