What started out simply enough last fall, with a one-off show in London in honor of the late Atlantic Records maven Ahmet Ertegun, has dissolved into chaos. Led Zeppelin is talking full-fledged reunion, and it's already become a right mess.

"I have not been approached so far to fill in for Robert Plant on the upcoming Zeppelin tour, but that isn't to say I won't be," Chris Cornell coyly told MTV News.