A couple of days ago, Foo Fighters overhauled their website with an unexplained countdown clock. Just as we were pondering what it all could mean, the band has updated their homepage again.

The countdown to Nov. 23 and the Foo Fighters’ logo in a crest reminiscent of a highway sign both remain intact. However, as Stereogum points out, the background image, which previously depicted some kind of statue, is now a tree. And the audio that once featured background chatter -- including Dave Grohl’s voice -- is now a longer loop of reverb-heavy guitar. The fan-made Twitter account, Foo Fighters Live, notes the audio’s MP3 file is dubbed “2nd Century AD.”

Share your educated guesses in the comments below, because we’re still at a loss. With that said, Butch Vig -- the producer behind the Foo Fighters’ most recent album, Sonic Highways -- recently told Billboard’s Alt in Our Stars podcast he thinks a follow-up to the album and the first season of the corresponding HBO TV series could land sometime next summer. So, perhaps Grohl and company will announce something official on Nov. 23.

“I think there is going to be a Sonic Highways II,” Vig said. “But it’s still in discussions right now. I know Dave and HBO both really want to do it, but it’s going to be different. It’s not going to be the same exact format as the last album… if it happens, it’ll probably happen next summer.”

On the flipside, fans have also speculated a forthcoming concert, or maybe that Monday in November will be the day Grohl finally removes his leg cast -- hooray!

Worst to First – Every Foo Fighters Album Ranked