A lawsuit involving the Dallas Mavericks centers on claims that team ownership restricted Mark Cuban’s access to business opportunities tied to a proposed arena move. According to reports, Cuban is alleging that Mavericks owners “froze” him out of potential opportunities related to the arena effort. The dispute comes after Cuban sold his majority stake in the franchise in 2023. Multiple outlets state that the sale transferred control to the families of Miriam Adelson and Dumont, with Dumont described as Adelson’s son-in-law. The reports say Cuban’s lawsuit argues that ownership’s actions limited his involvement despite the arena-related business prospects. The coverage does not provide additional details on the specific business opportunities at issue or the internal basis for the alleged restrictions. The allegations are presented as part of the legal filing and are subject to dispute in court. The proposed arena move is referenced broadly in the reporting, with no consensus details added beyond the core claim that Cuban was excluded from business opportunities connected to the deal.