The Foo Fighters are counting down to November 23rd, but WHYYYYY?

The band posted a ~mysterious~ countdown clock on their website Thursday (Oct. 29) which ticks away the seconds, minutes, hours and days leading up to the as-yet-unknown event, and fans are already throwing their guesses into the proverbial hat.

Here's what they think this might be about:

"Sonic Highways 2."

.@foofighters A website with a countdown clock that stops on Nov 21st & logo that looks like route 66 - sonic highways 2?? ? #foofighters

— Sophie Squirrel (@Sophie_1983) October 29, 2015

Dave Grohl said that they were interested in doing a second season of the HBO music documentary miniseries "Sonic Highways," which debuted last fall with eight episodes chronicling the band's recording adventures in eight different cities, and, since the band has been on tour since December, there could be some new material to roll out for the show.

Another tour.

It looks like @foofighters are going to pave the world with Sonic Highways, Started already in ready Europe. Seek! pic.twitter.com/0wjpPpcAep

— PuddleFreak (@PuddleJones) October 29, 2015

Foo Fighters will actually wrap up their world tour on Nov. 19th, just a few days before this clock runs up, with a send-off performance in Barcelona, Spain. But some fans think that more gigs are just an announcement away.

The Austin recordings.

@foofighters feeling this is a count down for the release of 5 songs they've recorded here in Austin???

— Richard Noriega (@R1chardNor1ega) October 29, 2015

While they were in Texas for the Austin City Limits Festival, the band revealed that they had an impromptu recording session and wound up laying down "five f--king new songs in your beautiful city," including one featuring Ben Kweller.

Super Bowl half-time show cameo.

@foofighters I hope it's your announcement for the halftime show at Super Bowl 50.

— Jenni (@JenniSurf5) October 29, 2015

The rumor mill is grinding right away about who'll take the stage for Super Bowl 50's halftime show, but a lot of fans are hoping it'll be the Foo Fighters who rock the house at Levi's Stadium next February.

Solidarity for Ahmed.

.@foofighters are just announcing their support for Ahmed.

— Andrew Polk (@polksalad) October 29, 2015

This is our favorite theory of them all, actually.

What do YOU think/hope is going on with this 24-days-and-ticking business?