https://www.cnet.com/news/aquaman-becomes-the-dceu-first-1-billion-box-office-baby/

While Aquaman is the first movie from the unofficially named-DC Extended Universe to earn a billion dollars, it's not the first-ever film from DC Comics to do so. The Dark Knight from 2008 and 2012's The Dark Knight Rises both have topped $1 billion.

The Dark Knight Rises, in fact, is still ahead of Aquaman with earnings of $1.0849 billion. That film came out in 2012, a year before the DC Extended Universe launched in 2013 with Man of Steel. ("Extended Universe" refers to the films made from then on, whose plots and characters share a creative world and sometimes reference each other.)