Now, in a new interview with The Daily Beast, producer Butch Vig has suggested that Grohl has started working on music away from the band.
"I just met with Dave and he’s been writing some songs, but there are no plans for more Foos," Vig said. "I know he talked about another 'Sonic Highways', but nothing’s come to fruition yet."
At the end of their recent spoof video, a statement reads, "For the millionth time, we're not breaking up. And nobody's going fucking solo!"
Simon Neil, Biffy Clyro: The shirtless Scottish wonder has shown a wide breadth of variety in his musical styles with the mathy alt-rock of The Biff and the delightfully twisted dance of Marmaduke Duke. While stadiums await Biffy and we wait with baited breath for the return of the Duke, we wouldn't say no to seeing another side to Mr Neil. Perhaps an acoustic solo album or exploring some electronica?
Alex Turner, Arctic Monkeys: The Sheffield icon's work on the soundtrack for Richard Ayoade's Submarine was pretty brilliant. We'd love to hear a little more of Turner's more cinematic acoustic style.
Win Butler or Regine Chassagne, Arcade Fire: Both are essential parts of one of the most seminal bands of our time - but one can't help but wonder what they'd sound like separately? Could Win be the next David Byrne? What could Chassagne achieve if her sweet vocals and epic piano work were given an album of their own?
Matt Bellamy, Muse: Many of Muse's finest moments are when Bellamy is let loose to do whatever the hell he wants with a piano. Imagine an album of insane piano-based space opera in the same vein as 'Space Dementia', 'Sunburn' and 'Butterflies And Hurricanes' - just Matt, a set of ivories and one hell of a voice. That'd be cool.
Romy Croft, The xx: The tight-knit relationship with Romy, Jamie and Oli are essential to the tender and intimate sound of The xx, and no one would replace that for anything - but one can't help but wonder what it would it be like to strip away the band and just hear Romy up close and personal. We think it would be lovely.
James Murphy, LCD Soundsystem: Since the demise of LCD,we've been craving Murphy's return to recording music. His production on Arcade Fire's Reflektor and awesomely epic remix of 'Love Is Lost' by David Bowie were reminders of what an inimitable talent he is. Hopefully his restless creativity will lead to experimental solo material soon?
Robert Smith, The Cure: Believe it or not, after decades with one of the most influential bands of all time, Godfather of goth-pop Mr Smith is one of the few artists of his standing that has never made a solo album. While he's done countless collaborations by himself and contributed a few solo covers to soundtracks, we think that justice to music history won't be done until Smith makes a full solo LP.
Dan Kessler, Interpol: The web of sound that Mr Kessler weaves is all part of what makes Interpol so enigmatic and alluring. Imagine an instrumental album of exactly that. Phwoar.
Beth Gibbons, Portishead: The chilling trip-hop queen made the folky Out Of Season with Talk Talk's Paul Webb, but the world is crying out to hear her hauntingly evocative and soulful voice stripped bare a lot more.
Yukimi Nagano, Little Dragon: Seriously, how wonderful would that be?
Michael Stipe, REM: Another solo album that we can't believe has never happened. With his monolothic and game-changing body of work behind him, maybe Mr Stipe should take those inimitable vocals and poetic musings into the studio for something on his own? We think that would be ace.
Josh Homme, Queens Of The Stone Age: The ginger Elvis and renaissance man of stoner rock has only really found his true voice on Like Clockwork - which may very well be the best rock album of the year. We've a taster of his sense of adventure, imagination and collaboration on the Desert Sessions series - but we'd very much welcome Homme dipping his toes into solo waters.
Kevin Parker, Tame Impala: No longer involved with Tame Impala's extra psychedelic side project Pond, Mr Parker should break away and venture out into the Australian forest, Justin Vernon style. However, he should take a big ol%u2019 bag of mushrooms and only re-emerge from the trees once he has made something spectacular.
Jesse Lacey, Brand New: Brand New always appear to be on the brink of collapse, with their loyal fanbase regularly meeting up for mass "Pray for a new album" sessions. When the inevitable occurs and they do dissolve, It'd be an interesting to hear the frontman break away and embrace his inner Thom Yorke.
Matt Helders, Arctic Monkeys: Arctic Monkeys' highly talented and technical drummer should team up with a credible hip hop producer like Alchemist or DJ Premier. Producer and drummer could then join forces to create a live percussion, experimental hip hop album that'll have the rap game's biggest players lining up to feature on.
Damian Abraham, Fucked Up: Anybody who's listened to the Fucked Up frontman's podcast Turned Out A Punk (where he interviews various artists about how punk influenced them) is surely aware that he can talk for days. At Gigwise, we think he should embark on some bizarre, spoken word musical odyssey about how he broke away from his straight edge ways.
Meg White, The White Stripes: The ex White Stripes drummer disappeared into obscurity after the band called it quits back in 2011, so even just a public appearance would be pretty groundbreaking. However, if she's interested in dusting off the drumsticks, she should provide the strange vocals, track down another great guitar player and get cooking.