A New York federal judge has halted the launch of a planned sports streaming service, Venu Sports, created by Disney, Fox, and Warner Bros. Discovery. The decision came after Fubo, another sports streamer, filed an antitrust complaint claiming the collaboration was designed to stifle competition. Fubo argued that the $42.99-per-month Venu Sports package would combine sports networks from all three media giants—like ESPN, Fox Sports, and TNT—placing other providers like Fubo at a severe disadvantage.

Several lawmakers, including Sen. Elizabeth Warren (D-MA) and Sen. Bernie Sanders (I-VT), had also expressed concern, warning that the partnership could monopolize televised sports and force competitors to negotiate for key broadcasting rights with companies that they’d also be competing against.

Judge Margaret Garnett of the Southern District of New York agreed that Fubo’s arguments had merit and issued a preliminary injunction, blocking the launch. The judge highlighted that if Venu Sports were allowed to proceed, it would create a market where sports fans have little choice but to buy into the joint venture if they want live sports without paying for non-sports channels.

Fubo’s CEO, David Gandler, celebrated the ruling as a victory for fair competition, stating that the decision preserves consumer choice in the sports streaming landscape. According to Gandler, the proposed venture is just the latest example of major media companies attempting to corner the market and restrict alternatives for consumers.

Venu Sports has not yet issued a response to the ruling.