The future of the San Diego Padres is at stake in a lawsuit brought on Monday by Sheel Kamal Seidler, the widow of late team owner Peter Seidler.

Expect the defendants—two of Seidler’s brothers, Bob and Matt Seidler—to not only argue that they have fully performed their fiduciary duties as trustees but also that their sister-in-law is misconstruing the wishes of her late husband and their late brother in ways that undermine his legacy. Matt said some of this already, not in a legal filing, but in a public letter addressed to fans on Tuesday.

Because the case involves sharply conflicting retellings of meetings, discussions and personal intentions, witness testimony will prove crucial. Among the witnesses who could be called to provide testimony are MLB officials and Padres employees—including players—who interacted with the Seidlers, particularly with respect to which person(s) appeared involved in important club decisions and what Peter Seidler indicated about his wife and brothers. Central to the case is whether Sheel Seidler was unlawfully denied a chance by her brothers-in-law to succeed her late husband as the Padres’ control person, who is the person regarded by MLB as the club’s decision-maker.