Jermaine was quoted as telling The Times magazine out Saturday that a private jet financed by a friend was on standby to whisk his late brother to the Gulf emirate if the 2005 court case ended with a conviction.
Bahrain does not have an extradition treaty with the U.S.
Jermaine says his brother did not know about the escape plan but Michael would have "done it in a heartbeat" because "why should he go to jail for something he didn't do?"
The singer was found not guilty on all charges.
He later spent a year in the emirate as a guest of a son of Bahrain's king.