Mark Cuban has gone to court over frustrations that he’s being kept in the dark about the Dallas Mavericks moving forward in their quest to build a new arena.

Cuban’s lawyers have filed a petition in Dallas County district court seeking sworn testimony from a corporate representative of the Arena Development Institute, a company formed by Mavericks ownership in Delaware.

In June, the Mavericks announced that they had entered into an option agreement for the potential purchase of 104 acres of land at the former Valley View Mall site in North Dallas.

The Mavericks’ lease at American Airlines Center expires in 2031, and the team hopes to move into a new building ahead of the 2031-32 season.

Cuban claims that this potential new arena deal could violate contracts he already has in place with the Mavericks’ owners in Texas.

In the document Cuban filed, he outlines his version of how he sold his majority stake in the Mavericks to Miriam Adelson and her son-in-law Patrick Dumont, the Sands Corporation CEO who also serves as the Mavericks governor. Cuban said he began working with them in 2019 to pass gambling in Texas. Their goal at the time was to build a “Venetian style destination resort” somewhere in the Dallas-Fort Worth Metroplex.

In 2023, Cuban officially sold his majority stake in the Mavericks to Adelson. Cuban said that they had a handshake agreement in place where he would remain in control of the Mavericks’ basketball decisions while Dumont would be in charge of the team’s business side.

“This handshake agreement was reiterated in multiple emails and orally in the presence of Dumont, Miriam Adelson, another NBA owner, and Mavericks employees,” Cuban’s legal action read.

The Athletic asked Cuban if he could produce these emails. Cuban replied, “Can’t say anything at all.”

Dumont, of course, leaned on former general manager Nico Harrison to make basketball decisions, which went well — at first. The Mavericks made separate moves for P.J. Washington and Daniel Gafford ahead of the 2024 trade deadline, which resulted in them catching fire to close that season and making a surprise run to the NBA Finals.

But all of that goodwill was erased when Harrison decided to trade Luka Dončić to the Los Angeles Lakers in February 2025 — a failed move that eventually cost Harrison his job.

In May, Dumont hired Masai Ujiri — a championship-winning executive who spent 12 seasons running the Toronto Raptors — to take over in Dallas as president and alternate governor. Ujiri will clearly wield significant power in Dallas. In one of his first major moves, Ujiri chose to fire coach Jason Kidd, despite Kidd having more than $40 million remaining on his contract.

Cuban maintains a 27 percent stake in the Mavericks but has minimal say in the day-to-day operations of the team. In the petition Cuban filed in court, he claims that Dumont once told him, “Why would I give you control of a $4 billion asset?”

— Melody Gutierrez and Nathan Fenno contributed to this report