LOS ANGELES, California (CNN) -- 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.



Katherine Jackson has accused the executors of her son's estate of "keeping her in the dark."



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.



The oldest child -- Michael Joseph Jackson Jr. -- was born in February 1997. A daughter -- Paris-Michael Katherine Jackson -- was born the next year. Details of how the children were conceived -- and who was the biological father -- have been closely guarded amid much public speculation.



The couple divorced in 1999 with Rowe giving Jackson full custody while she got an $8.5 million settlement, according to court documents. Jackson later agreed to additional support.



Rowe gave up parental rights to Jackson in 2001, but she changed her mind more than two years later and sought temporary custody of the children. A California appeals court later ruled her rights were improperly terminated, opening the door to a possible custody battle.



While the coroner's report on what killed Michael Jackson has been delayed indefinitely, new evidence emerged that the singer shopped for a doctor who would give him the drug investigators suspect led to his death.



Dr. Allan Metzger, whose name appeared on a search warrant served this week, refused Jackson's request in April for the anesthetic propofol -- commonly known by the brand name Diprivan -- Metzger's attorney said.
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question: What did the lawyer's petition accuse?, answer: 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. | question: What are executors accused of?, answer: "keeping her in the dark." | question: Who is looking for control in the article?, answer: Katherine Jackson's | question: What does Jackson want executors to answer questions about?, answer: their business agreements | question: Whose estate is Katherine Jackson seeking control of?, answer: her son's | question: What was Katherine Jackson looking for?, answer: some control of her son's estate | question: What was Jackson looking to control?, answer: her son's estate | question: What does Jackosn want the executors to answer questions about?, answer: their business agreements | question: Who is accused of keeping Jackson "in the dark"?, answer: the executors of her son's estate