Looks like in between playing with King Crimson, Volto! and writing Tool songs, Danny has found time to record a track with Feersum Ennjin called The Fourth.  Here’s the story from Facebook:

We’re moving the release date of "Feersum Ennjin" back to Nov. 22 so we can include a new song, "The Fourth." "The Fourth" was recorded very recently and reunited Paul with his former band mate, Danny Carey, for the first time since 1995’s Aenima.

Should be an interesting album, and I’ll definitely be giving it a listen!