California Attorney General Rob Bonta's antitrust case against the proposed Paramount-Warner Bros. merger hit a major roadblock when Cinemark sided with AMC and Regal in supporting the deal. The three largest theater chains in North America now stand unified behind the combination, undermining a core pillar of Bonta's legal strategy.
Bonta filed suit in July arguing that merging Paramount and Warner Bros. would harm both theatrical exhibition and cable providers by concentrating too much content power in a single studio. His aggressive posture succeeded in delaying the deal until spring 2025, positioning him as a rare state-level player willing to challenge major media consolidation. The California AG leveraged concerns from theater operators to build credibility for his antitrust arguments.
That approach now faces erosion. When AMC and Regal, which control roughly 40 percent of U.S. theater screens, announced support for the merger, they signaled confidence that a combined Paramount-Warner Bros. would actually benefit theatrical business through efficient content output and cross-promotional muscle. Cinemark's decision to join them removes the narrative that exhibitors fear the deal. These chains operate under different economic models and face distinct strategic pressures, yet all three reached the same conclusion: the merger poses no threat to their operations.
The theater chains matter because their formal opposition would have strengthened Bonta's arguments considerably. Courts evaluate antitrust cases partly on harm to downstream businesses. Theater operators have direct leverage in these arguments because they literally carry the studios' products to consumers. When they testify that a merger helps rather than hurts them, they flip the plaintiff's narrative.
Bonta still has cable and streaming providers in his corner. Companies like Charter Communications and Comcast face different concerns. A merged Paramount-Warner Bros. could leverage exclusive content distribution deals or pricing strategies that disadvantage traditional pay-TV. That remains a credible avenue for his case. Bonta can argue that harm to cable providers and the broader competitive ecosystem justifies blocking the deal regardless of theatrical support.
The timing of theater chain endorsements reflects industry economics post-pandemic. Exhibition faces structural headwinds: streaming cannibalization, shrinking theatrical windows, and audience fragmentation. Theater operators increasingly view studio consolidation as potentially beneficial. Fewer, larger studios can theoretically justify bigger tentpole investments. A combined Paramount-Warner Bros. would generate more consistent product flow across theatrical releases and franchise tentpoles. That logic appeals to AMC, Regal, and Cinemark more than hypothetical competition concerns.
For Bonta, the path forward requires sharper focus on cable harm and consumer benefit arguments. He can't rely on theater chain testimony to carry his case. Instead, he must prove that combining Paramount's cable networks and content library with Warner Bros.' production scale creates anticompetitive leverage that harms pay-TV subscribers or independent distributors. Courts examine these cases through multiple lenses. Loss of theatrical support doesn't kill his case, but it removes convenient evidence and forces him into more technical regulatory arguments.
The spring 2025 hearing will test whether Bonta can build a winning antitrust narrative without the exhibition sector's backing. Theater chains chose pragmatism over competition doctrine. He'll need to prove the merger harms broader consumer welfare despite theater industry support.