Advance tracking for Supergirl has weakened in the final weeks before its June 26 domestic release, with the latest data from NRG pointing to a $51 million three-day opening — down from the $55 million-plus projection that circulated when the film entered tracking three weeks ago, per Deadline.

The spread between tracking services is substantial. One model places the domestic opening anywhere from $47 million to $65 million, a range that reflects real uncertainty about audience interest rather than differences in how trackers do their math. Social media sentiment toward the film, starring Milly Alcock as Supergirl, has trended downward in the days immediately before release, according to Forbes.

That $18 million gap matters. Tracking models for superhero films — especially those launching a new take on an existing character — are notoriously volatile. People know what Supergirl is; that does not mean they feel urgency to see it this weekend rather than waiting six weeks to stream it. The real question, and the hardest one to measure before release, is whether the general moviegoing audience will show up now or defer.

The decline from $55 million to $51 million over three weeks is not by itself catastrophic, but direction counts. Tracking that climbs toward opening weekend builds momentum in how theaters allocate screens and how media outlets frame the story; tracking that declines does the opposite. A $51 million domestic opening for a film of this budget — part of James Gunn's rebooted DC Universe — would be a solid result, not a failure. It would, however, fall short of the kind of statement number Warner Bros. Discovery needs given how much they've already spent repositioning the franchise.

If the film lands at the $47 million floor, the situation becomes more complicated. Modern superhero films routinely cost $200 million or more before marketing expenses, and domestic theatrical revenue typically accounts for 40–45 percent of total global theatrical income. A soft opening at that end of the range would require strong international performance and favorable audience retention patterns (what the industry calls "legs") to reach breakeven — both harder to achieve for a character without the global brand recognition of Superman or Wonder Woman.

Falling social sentiment in the final stretch before release historically predicts softer-than-tracked openings. It does not forecast a disaster; it narrows the chance of the upside scenario playing out. The $65 million ceiling remains possible — a competitor's film could stumble, Thursday preview numbers could surprise to the upside, or critical consensus could shift — but the most likely outcome has clearly drifted toward the middle and lower ends of the band.

Alcock, known from House of the Dragon, is the commercial foundation of the film. New-lead risk is a genuine factor in superhero openings. The last several DC films that fell short of their tracked range shared something in common: they introduced characters without established theatrical histories. Whether audiences will translate the goodwill Alcock earned on television into the superhero blockbuster context is the central unknown — one that no tracking model can fully account for.

Friday's actual numbers will narrow the range considerably. Thursday preview numbers deserve close attention; they are the earliest hard data and, for this genre, a reliable guide to how the full three-day will shape up.