A state attorney general can try to block the Warner Bros.–Paramount deal by filing an antitrust lawsuit in state or federal court and asking for an injunction to stop the merger from closing. Reports say California’s Rob Bonta, along with New York and other states, are the main likely challengers after federal approval cleared the way.

How it could work

  • The AG would argue the merger could reduce competition, harm consumers, or create a media giant with too much market power.
  • The state could seek a court order to pause or block the transaction while the case is litigated.
  • Even if the federal government signed off, states can still bring their own claims under antitrust laws and state consumer-protection laws.

Why this deal is vulnerable

  • The size of the combined company makes it easier for opponents to argue the deal would reshape television, streaming, and movie markets.
  • Reuters reported that California has already been reviewing the transaction and viewed it as a possible major obstacle.
  • Several outlets say state AGs are treating this as the last meaningful domestic hurdle.

What the companies may argue

  • Paramount is likely to say the merger is pro-competitive or needed to strengthen the company against larger rivals.
  • Its legal team may also argue the deal does not create the kind of monopoly power antitrust law forbids, and that any harms are speculative.
  • The company may try to settle with regulators by offering concessions before a lawsuit fully develops.

Likely outcome path

  1. The AG announces an investigation or lawsuit.
  2. The state asks for an injunction.
  3. A judge decides whether the merger should be paused.
  4. The parties either settle, appeal, or abandon the deal if the risk is too high.

Bottom line

A state AG does not “veto” the merger directly; the power comes from suing and convincing a judge that the deal should be blocked or delayed. Based on current reporting, that is exactly the strategy California and possibly New York are preparing to use.