Sometimes the only salve that soothes the pain of a band or group breaking up is the idea that there could be a much-heralded reunion down the road! Rock's favorite sons Black Sabbath and Led Zeppelin top the list of bands that are ripe for a reunion, along with the Kinks, Pink Floyd and Creedence Clearwater Revival.

Said list, devised by Billboard, is populated by a smattering of pop, hip-hop and rock acts, including The Smiths, The Fugees, N' Sync, Talking Heads, Destiny's Child and ABBA. We know, it's not every day that Sabbbath and Zep are mentioned in the same sentence as ABBA, but we agree with the overall sentiment. Our worlds would be better if Ozzy Osbourne, Tony Iommi and co., and Robert Plant and Jimmy Page and crew found a way to get back together and record or hit the road. Or if we're lucky -- both!

Led Zeppelin split for good when drummer John Bonham died, but the surviving members have reunited here and there for the last 30-plus years. The 2007 show at the O2 Arena in London sparked rumors of a reconciliation, with Bonham's son Jason smashing the skins in his father's stead. 20 million fans requested tickets to the gig, but a full-scale reunion never materialized. Plant even issued a statement in 2008 saying that the rumors were frustrating in addition to being ridiculous. The remaining members tried to find someone to fill Plant's boots, but called off the search in 2009.

Black Sabbath reunion rumors are much more prevalent and the possibility is much more realistic than Zeppelin, especially right now, with Tony Iommi talking about practicing and Ozzy's kids sort of hinting that Ozzy was doing something so huge that he had to miss the premiere of the doc about about him that his own son directed. What could be bigger than working on Sabbath, right? Anticipation is at an all time high, and while we loved the Ronnie James Dio and Ian Gillan-fronted versions of Sabbath, there's only one Blizzard of Oz! Ozzy also recently told Billboard that there is a strong possibility that a reunion is in the early stages.

The battles between Kinks' brothers and bandmaters Ray and Dave Davies have been very public, lacing that reunion with pipe dream status. Pink Floyd's David Gilmour has no interest in resurrecting his band, either. Creedence Clearwater Revival reforming isn't likely either, given the battles between John Fogerty and the rest of the band. Fogerty did recently say he'd entertain the thought… yet it felt like an afterthought, at that.

When it comes to grand scale rock reunions, there's only one thing you can do and that's hope!