This handout photo shows Michael Jackson's daughter Paris, his mother Katherine Jackson and his youngest son Prince Michael Jackson II at Michael Jackson memorial service in Los Angeles on July 7. [AP]

Katherine Jackson's legal battle for some control of her son's estate returns to court Monday in front of the same judge who is expected to award her permanent guardianship of Michael Jackson's children.

Dozens of lawyers are expected to pack a Los Angeles courtroom where a judge will consider the Jackson family matriarch's challenge of the lawyer and former music executive who were named as executors in Michael Jackson's will.

Katherine Jackson's lawyers filed a petition last week accusing the men who now control the estate of being "intent on keeping her in the dark" about deals they've made or are negotiating.

Londell McMillan, Jackson's lead attorney, raised questions about "a suspicious circle of relationships" involving John Branca, the singer's longtime personal attorney, and John McClain, a music industry executive and longtime friend.

Los Angeles Superior Court Judge Mitchell Beckloff gave Branca and McClain temporary control of the estate until Monday's hearing.

Katherine Jackson is asking the judge to order Branca, McClain and others to answer questions under oath about their business agreements to determine if they are "fit and able" to administer the estate. The men also were served with a 19-page demand for documents.

Branca has refused to let Katherine Jackson see Michael Jackson's contracts with AEG -- the company that was organizing and promoting his planned concerts -- unless she agrees to keep them confidential. Branca's lawyer argued in a court filing that he has no choice, since the contracts have a provision requiring confidentiality.

Branca's lawyers also argued that Jackson's demand for documents was too broad and burdensome.

"Such measures will not be necessary if Mrs. Jackson is appointed a co-executor of the estate," McMillan said.

McMillan, in an interview with CBS Thursday, estimated the Jackson estate was worth $2 billion, while the executors have estimated in court that its value is around $500 million.

The will written in 2002 places all of Michael Jackson's assets into a family trust benefiting his mother, his three children and unnamed charities.

Judge Beckloff will consider at Monday's hearing who will have permanent control of the estate.

The judge is also expected Monday to finalize Katherine Jackson's guardianship of her son's three children. An agreement between Jackson and Debbie Rowe, the mother of the two oldest children, cleared the way for an uncontested custody hearing.

Rowe, who was briefly married to Michael Jackson, agreed not to fight for custody in exchange for visits with the children as recommended by a psychologist.

The agreement does not involve any financial payments to Rowe "apart from the continuation of spousal support payments" that Michael Jackson personally agreed to make to Rowe after their divorce, their lawyers said in a joint statement.

Jackson's children have been living with their paternal grandmother at her Encino, California, home since their father's death.

(Agencies August 3, 2009)