LOS ANGELES (CNN) -

The saga of billionaire Donald Sterling enters a new phase Monday when a California probate court trial examines his estranged wife's takeover of the couple's trust that owns the Los Angeles Clippers, which she is now trying to sell for a record $2 billion.

It's been an operatic tale.

Sterling slurred African-Americans in a taped conversation with a female acquaintance. The National Basketball Association banned him and ordered the couple to sell the team. His wife, Shelly, negotiated a price that would be unprecedented for a sports franchise in North America. She did so as doctors certified Donald Sterling, 80, as incapacitated with early Alzheimer's or another brain disease.

Questions persist, however, on whether the team's planned sale to former Microsoft CEO Steve Ballmer is a done deal, because Donald Sterling disputes his wife's authority in the negotiations. The couple own the NBA franchise through a trust.

Will there be a trial Monday?

It's anybody's guess: Anything can happen in the Sterling saga -- and just about has.

Donald Sterling now wants to move the controversy over the basketball team's proposed sale to federal court -- a legal move he made just before Friday's Fourth of July holiday.

It's unclear whether he'll be successful -- or what effect the last-minute maneuver will have on Monday's scheduled trial in a state court in Los Angeles.

Shelly Sterling's attorney described the move as desperation.

"Donald Sterling's 11th-hour attempt to move the probate trial into the federal courts is a desperate act by a desperate man," said Pierce O'Donnell.

"This latest bad-faith maneuver on the eve of his reckoning is a cowardly ploy to do just one thing: Kill a record-setting $2 billion sale of the Clippers," O'Donnell said.

But Donald Sterling's attorney says federal court is the appropriate place to hear how the publicizing of his medical diagnosis "trampled" his privacy rights under the federal Health Insurance Portability and Accountability Act (HIPAA) -- which Shelly Sterling denies, saying the trust allowed for the information's release.

"While Shelly Sterling and her team will claim that this is merely a 'tactic,' we feel strongly that this important issue should be addressed by the federal court at this time," said lawyer Bobby Samini. "While it has become popular to attack Donald Sterling for his regrettable comments, his right to privacy and to the protection of his medical records should not be acceptable collateral damage."

Even Ballmer has entered the dispute, with his attorney saying he would file papers to block what he called a frivolous move by Donald Sterling.

The parties will be monitoring how the state and federal courts will proceed Monday.

Will we hear more about Donald Sterling's mental issues?

No.

The trial will focus on Shelly Sterling's right to sell the Clippers and not Donald Sterling's mental capacity, attorneys for both sides say.

Testimony will largely focus on how the couple own the team through a trust and whether procedures for removing one of the trust's owners -- namely Donald Sterling -- were followed.

The trial, however, will address an accusation by Donald Sterling that his wife duped him into undergoing separate examinations by a neurologist and a specialist in geriatric psychiatry, who both judged him to be mentally incapacitated.