“This is extraordinarily rare — the judicial equivalent of winning the lottery,” said Daniel Wallach, a sports and gambling lawyer at Becker & Poliakoff in Fort Lauderdale, Fla. “It means that New Jersey’s sports betting hopes are alive and strong, and at least six out of the 10 judges who signed the order thought there were some significant issues to readdress.”

It was the latest development in a more than three-year battle pitting New Jersey against national sports organizations over the state’s efforts to expand gambling to sports events, and it came amid a growing appetite for sports wagering. Lawmakers across the nation have looked to legalized sports betting as an opportunity to shore up sagging state budgets with taxes on a pastime already engaged in illegally by millions of Americans.

The booming industry of daily fantasy sports games had successfully tried to take advantage of that void until a recent scandal involving accusations of “insider trading” and predatory practices by some of its employees caught the attention of Congress and state attorneys.

The New York attorney general has opened an inquiry into the prospect that employees of DraftKings and FanDuel, the leading daily fantasy companies, won lucrative payouts based on information not available to the public. In addition, three class-action suits have been filed alleging fraud — the most recent in Louisiana, where the operation of daily fantasy sports is prohibited. Still, the plaintiff, Artem Genchanok, a New Orleans resident, said he had paid entry into DraftKings and FanDuel contests and deposited money on their websites.