NEW YORK (AP) — Twelve states sued to block Paramount’s takeover of Warner Bros. Discovery on Monday, arguing that the $81 billion merger would “extinguish competition” in Hollywood and lead to fewer choices for consumers across the U.S.

“Audiences on every sofa and in every movie (theater) seat would feel the impact of this unlawful merger,” California Attorney General Rob Bonta, who is leading the case, said in a news conference from Los Angeles. He said the deal would result in higher prices, fewer movies and TV shows and lower quality of content overall.

A Paramount-Warner combo would bring together two of Hollywood’s last five legacy studios. It would also mean putting Warner’s HBO Max, libraries filled with cult-favorite titles like “Harry Potter” and even CNN under the same roof of Paramount-owned CBS and the Paramount+ streaming service.

In Monday’s complaint, the states said such a tie-up would also “inflict substantial harm” on movie theatres and basic cable distributors. Bonta’s office said the states are asking Warner and Paramount to not close this merger “until after the judicial process concludes.” And if the companies do not agree, the coalition would then file a temporary restraining order.

Paramount said Monday’s lawsuit “distorts settled antitrust law” and maintained that its merger would instead create a “stronger competitor against dominant streaming and technology platforms who have harmed the market for theatrical exhibition and jobs in the entertainment industry.”

The company, which was bought by Skydance just last year, vowed to “vigorously defend” the transaction.

Warner deferred to Paramount for comment. Beyond California, states joining Monday’s lawsuit include Arizona, Colorado, Connecticut, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon and Washington.

Monday’s antitrust case arrives at a pivotal time for the Paramount-Warner transaction — which, after months of what became a very public bidding war with Netflix, received shareholders’ stamp of approval in April and then a blessing from President Donald Trump’s administration just last month.

The companies have hoped to close their deal sometime in the third quarter of this year, recently signaling an effort to complete the process in the coming weeks. The states’ lawsuit could throw a wrench in those plans, at least for now.

The clock is ticking. Paramount also pledged to give shareholders some compensation if that process isn’t complete by Sept. 30 — in the form of a 25-cent per share “ticking fee” for every quarter past that date. And it’s agreed to a regulatory termination fee of $7 billion.

Beyond the U.S., Paramount has touted additional regulatory clearances it says it’s received in a handful of other countries, including China, Canada and Australia. Meanwhile, other reviews remain in progress, including in the European Union and the U.K. — which has separately suggested it may intervene.

Including debt, Paramount’s proposed purchase of Warner is valued at nearly $111 billion (or $31 per share) based on current outstanding shares.

Warner and Paramount argue that merging will be good for growth in the industry and give consumers access to more content, especially if HBO Max and Paramount+ libraries are combined. But critics have decried what further consolidation could mean in an industry already controlled by just a few major players.

Monday’s lawsuit from the states pointed to movies that make their way into theaters and the wider TV landscape — noting that a combined Paramount-Warner could control nearly a third of both the theatrical film distribution market as well as basic cable programming.

Such a combination would create “a massive company with unprecedented power and influence over news and entertainment across the globe,” said New York Attorney General Letitia James, who is among those challenging the deal. Beyond consumer impacts, she also said the merger would “put jobs and businesses nationwide at risk.”

Thousands of actors, directors, writers and other industry professionals have already voiced “unequivocal opposition” to the deal. Monday’s challenge garnered applause from groups like the Writers Guild of America, who warn that consolidation would result in “fewer jobs, lower wages for entertainment workers, less variety of programming, and higher prices for consumers”

Paramount argued on Monday that delaying the merger “will only harm entertainment workers who have already suffered over recent years as technology has disrupted their livelihood.”