It doing better domestically is far more important as the studio gets a better cut of the profits, and the word of mouth so far is better than I think (correct me if I'm wrong) any film we got from the DCEU, particularly Snyder's which always collapsed into the 2nd week. There's also the matter of it surging HBO Max subscriptions and reviewing exceptionally well which should with some luck translate to more box office enthusiasm for the next films. Even if it only manages to barely scrape its budget back, I can't imagine execs are going to be disappointed when most people seem pretty optimistic at the least for what's next to come.

Everything now depends on how good Supergirl and Clayface is.