What happened: Mark Cuban filed a petition in Dallas County accusing Mavericks governor Patrick Dumont of adversarial business practices. The filing alleges Dumont reneged on an agreement allowing Cuban to retain control of basketball operations after selling his majority stake. Cuban claims he was shut out of the 2025 trade sending Luka Dončić to the Los Angeles Lakers.

Why it matters: The legal escalation threatens to complicate the franchise's proposed move to a new arena in North Dallas. It also exposes deep operational fractures between the ownership groups following the decision to part with their franchise cornerstone. If successful, the petition could force Dumont and Miriam Adelson to disclose confidential financing structures.

What to watch: The court will decide whether to compel majority ownership to disclose details regarding the planned Valley View development.