Michael Jackson’s estate has won a tentative court ruling that would allow it to proceed with a $600 million sale of the singer’s catalog to Sony Music, overcoming objections from his mother that aimed to block the deal.

Katherine Jackson had argued that the gargantuan deal violated the terms of Michael’s will, but a California appeals court tentatively ruled Wednesday (July 17) that she had “forfeited” that argument by failing to make it before a lower probate court.

Even if she had properly raised that argument, the appeals court said the estate’s executors had the power to make the deal. The court said Jackson’s will had vested the executors (John Branca and John McClain) with the authority to “sell, invest, or otherwise manage estate property” while they were in charge.

“The court is tentatively inclined to affirm the probate court’s order granting the executors’ request to proceed with the proposed transaction,” the appeals court wrote in its ruling, obtained by Billboard. “We tentatively conclude that Katherine’s challenge fails on the merits because the probate court’s order does not violate the terms of Michael’s will.”

Such “tentative” rulings must be finalized before they are formally entered, but they strongly indicate the way the court is planning to rule. An attorney for Katherine did not return a request for comment on Thursday. A rep for the Jackson estate declined to comment. News of the tentative ruling was first reported by Rolling Stone.

As reported by Billboard earlier this year, the Jackson estate and Sony Music have reached a deal that will see the music giant buy half of the singer’s publishing and recorded masters catalog for more than $600 million.

But because the Jackson estate is still pending before a Los Angeles probate court more than 15 years after his 2009 death, his executors took the then-confidential deal to Judge Mitchell Beckloff for approval. When they did so, Katherine filed objections — among them that the sale “violated Michael’s wishes” and that the catalog would likely continue to gain value over time if retained.

In April 2023, Beckloff rejected those objections and ruled that the deal could move forward. Katherine then filed an appeal, resulting in Wednesday’s tentative decision.

The wrangling over the Sony deal has exposed rifts among Jackson’s heirs. In March, Jackson’s son Blanket asked the judge to stop his grandmother from using estate money to fund her efforts to block the Sony deal. Though both had initially opposed the sale, Blanket and Jackson’s other children accepted the probate judge’s decision allowing it to move forward.

Later that same week, the estate responded to claims from Katherine’s attorneys that she needed estate money to pay for her legal battle, arguing she had received more than $55 million since the singer’s death. The estate’s executors argued that “virtually no request of Mrs. Jackson for her care or maintenance has been declined,” including more than $33 million in cash.