Full Breakdown
Mark Cuban Sues Mavericks Owners Over New Arena Deal and Loss of Basketball Control
7/10/2026, 1:29:15 PM
Dispute Over Proposed North-Dallas Arena
Mark Cuban has filed a Rule 202 “pre-suit deposition” request to obtain discovery from Arena Development Intermediate LLC (ADI), the entity created by Dallas Mavericks governor Patrick Dumont to develop a new arena on the former Valley View Mall site. The filing alleges that ADI’s “non-disclosure” and “adversarial business practices” keep Cuban out of decisions that his contracts say he is entitled to participate in, including financing and site selection for the 104-acre, $4 billion-valued project slated to open in 2031.
Background and Ownership Structure
In 2023 Cuban sold his majority stake in the Mavericks to the families of Miriam Adelson and Patrick Dumont for $3.5 billion, retaining a 27 % minority interest. The purchase agreement contains a clause that would allow the Adelson-Dumont group to acquire an additional 20 % of Cuban’s share, potentially reducing his stake to 7 %. A “handshake deal” at the time stipulated that Cuban would retain authority over basketball operations while Dumont would oversee business matters, including real-estate development and a destination-resort casino.
Timeline of Key Events
- 2023 – Cuban sells majority ownership to the Adelson family and Dumont.
- February 2025 – General manager Nico Harrison trades franchise star Luka Doncic to the Los Angeles Lakers, a move Cuban says he learned of too late to block.
- November 2025 – Harrison is dismissed after a slow start to the 2025-26 season.
- April 11 2025 – Dumont responds to Cuban’s filing, asking, “Why would I give you control of a $4 billion asset?”
- June 27 2025 – Reports surface that Cuban is filing a pre-suit deposition to investigate the arena plan.
- March 23 2026 – Additional filings reiterate Cuban’s claim that the original agreement was breached.
Data & Statistics
- Cuban’s current ownership: 27 % (potentially reducible to 7 %).
- Sale price of majority stake: $3.5 billion.
- Proposed arena site: 104 acres at the former Valley View Mall.
- Franchise valuation cited by Dumont: $4 billion.
- Projected tourism impact cited by Cuban: up to $10 billion if a Venetian-style resort is built.
Official Statements & Responses
Patrick Dumont defended his position, stating, “Why would I give you control of a $4 billion asset?” Cuban’s filing contends that Dumont “did not fulfill his end of this agreement, and I did not retain control over basketball operations,” and that ADI’s secrecy “improperly interferes with Petitioners’ existing Texas contracts and related rights.”
Criticism & Opposition
Commentary in the press characterizes Cuban’s legal maneuver as “petty,” noting that the dispute centers on a real-estate venture rather than on-court sports performance. Critics also point to the public backlash over the Luka Doncic trade as evidence that the ownership group’s decisions have already strained fan relations.
Verbatim Quotes
- “Dumont did not fulfill his end of this agreement, and I did not retain control over basketball operations.” — Mark Cuban, filing
- “Dumont did not fulfill his end of this agreement, and I did not retain control over basketball operations. Instead, former General Manager Nico Harrison was put in charge, leading to the trade of Luka Doncic. When I discussed this with Dumont over the phone, he told me, ‘Why would I give you control of a $4 billion asset?'” — Patrick Dumont, response
- “I supported the (Adelson family’s) Las Vegas Sands’ effort because I believed that having a Venetian-style destination resort would turn Dallas into the largest tourist destination in the United States and be worth potentially $10 billion,” — Mark Cuban, filing
- “Petitioner seeks information regarding the financing of a new Dallas Mavericks arena at Valley View and the exploration and identification of locations for the new arena, among other things,” — Court filing
- “Cuban said he had an agreement to continue running basketball operations, but Dumont gave former general manager Nico Harrison full control of the basketball side.” — Mark Cuban, filing
What’s Next
Cuban’s Rule 202 request seeks depositions of ADI executives and Dumont, aiming to uncover documents related to financing, site selection, and any alleged contract breaches. No court dates have been set, and the parties have not announced any settlement talks.
