Pearl Jam‘s Mike McCready and former Guns N’ Roses bassist Duff McKagan have formed a new supergroup with former Screaming Trees drummer Barrett Martin. The new group does not yet have a name, and the band will be recording with multiple vocalists.

“Duff and Barrett and I got together. We wrote some new stuff and we took some of those old Mad Season demos from that [unreleased] second Disinformation record, so we are trying to find something to do with those,” McCready told Billboard. “We’re talking to Jaz [Coleman] from Killing Joke and I’ve been trying to find some singers to work on some of that stuff.”

Mad Season, the band McCready and Martin played in with Alice in Chains singer Layne Staley and bassist John Baker Saunders, will reissue the group’s only album, Above, on April 2, 2013.

McKagan and Martin also play together in the band Walking Papers, with whom McCready worked while the band recorded their debut album last year.

“I had a whole bunch of song ideas and Mike had a whole bunch of song ideas and Duff had a whole bunch of song ideas that were not making it into Walking Papers,” said Martin. “We decided that we would go into the studio and record them. Right now they’re being sent out to different singers. Mike and Duff are overseeing that because they know everybody. As the different singers finish their songs and turn them in, that will determine when they get put out.” (via RS)