The Rolling Stones have issued a cryptic tweet hinting at a possible appearance at a new fall music festival that is being referred to as a "classic rock Coachella."

The update was only a 30-second song snippet, Exile on Main St. track "All Down the Line," and one word: "October."

Billboard reports that Paul McCartney, Bob Dylan, Neil Young, Roger Waters and the Who are among those rumored for the new fest, presented by Golden voice Entertainment, set to be held at the Coachella site in Indio, California.

Shows would take place in October, according to reports.

The event would have a three-day run, with Dylan and the Stones on October 7, McCartney and Young on October 8 and Waters and the Who on October 9, the festival's final night.

A second weekend is in the discussion phase, Billboard says. Each participating act could reportedly be guaranteed as much as $7 million each.