IDMf, the band. 
I honestly don’t think it would be that difficult. Each member could pick a WIP of theirs and share it with the rest. We might have to think of a pipeline of how to start. Probably lead, bass, and perc, figure out the structure, then the other stuff (and the back and forth would lead to some evolution and inspiration along the way).
First we have to see if anybody is down, then form a PM group. Using old WIPs would also help us leave our egos at the door.