We're just guessing here, but it appears Paul McCartney has confirmed his participation in a huge mega-concert reportedly slated for later this fall. The former Beatles star posted a 30-second snippet to Facebook today (May 1) with a simple message: October. He soundtracked it with a live take on "I've Got a Feeling," from 1970's Let It Be.

The Who, Bob Dylan and Roger Waters have each posted similar teasers, all in the wake of a rumored classic-rock festival sponsored by Goldenvoice Entertainment to be held on Oct. 7-9 at the Empire Polo Field in Indio, Calif. — site of the annual Coachella Festival. The Rolling Stones and Neil Young were also believed to be part of the eye-popping bill at this "Classic Rock Coachella."

Waters' clip included music from Pink Floyd's “Brain Damage” and the Who included “My Generation,” while Dylan incorporated “Ballad of a Thin Man.” Just as with the McCartney teaser, each ended with the word “October.” Roger Daltrey had already all-but confirmed the Who’s involvement.

Nothing more concrete has been confirmed. An October appearance at Indio, however, would expand what already promises to be a very busy year for McCartney. He recently extended the on-going One on One tour, and also has plans to release a solo career-spanning greatest hits collection that updates earlier hits sets like 1987's All the Best and 2001's Wingspan. The 76-track Pure McCartney is due on June 10.

Paul McCartney Albums Ranked Worst to Best

More From Ultimate Classic Rock