A series of previously unreleased duets from two late music icons — Michael Jackson and Freddie Mercury — will purportedly debut this fall.

There will be "something for folks to hear" in the coming months, Mercury's former Queen bandmate Brian May told the U.K.'s Times newspaper.

May and colleague Roger Taylor have been preparing the sessions for release, calling the work "exciting, challenging [and] emotionally taxing. But cool."

Jackson and Mercury became friends in the 1980s and collaborated by recording a few songs together at the former's home studio in California during one six-hour session. However, an alleged spat prevented the two from continuing on with the project.

In 2011, May revealed that the Jackson estate had given him permission to rework the three tracks the pair recorded. At the time, he predicted the songs would be ready for release in 2012.

Jackson, 50, died in 2009 from an overdose of the surgical anesthetic propofol and two other sedatives.

Mercury died of pneumonia in 1991, a day after publicly acknowledging he had AIDs. He was 45.