You read that right – The Flash, a movie widely considered to have underperformed in the box office, trumped Titanic at the start of its theatre run. During its opening weekend, the film netted $55.1 million, while Titanic opened to a comparatively meagre $28.6 million. Of course, there were 12 years between the two – but even adjusted for inflation, Titanic's opening weekend only earned Paramount $54.4 million. It "would still be the lowest opening weekend in the top 10", ScreenRant says.
While The Flash enjoyed bigger box office success during its opening weekend, it's very, very unlikely to surpass Titanic in terms of overall box office earnings. The epic romance-drama dominated the box office for months, eventually becoming the highest-grossing film of its time and retaining that title for over a decade.