Mark Cuban’s dispute with Mavericks majority owner Patrick Dumont is escalating into a legal battle, per the Dallas Morning News. Cuban reportedly filed a petition in Dallas County seeking access to details surrounding the Mavericks’ planned arena development at the former Valley View Mall site, including financing plans, corporate structure, and the land acquisition agreement. In the filing, Cuban alleges Dumont has excluded him from key business decisions and engaged in “adversarial business practices,” despite Cuban’s belief that he retains rights to participate in the team’s broader business opportunities. The move marks the latest chapter in more than two years of reported tension between the franchise’s largest shareholders.