Following Tuesday's announcement of the long-awaited Oasis reunion shows, including two nights at Croke Park, the big question now is are the brothers gonna work it out?
Whatever about five nights at Wembley Stadium, will Liam and Noel be able to last five minutes in each other's company during rehearsals for the shows?
For if there is one thing we have learned about the irascible Gallagher brothers, it's that everything has always been not so much, as the song goes, up in the sky as up in the air.
It all ended in ignominy for the biggest band in Britain 15 years ago following a backstage bust-up at a Paris rock festival that allegedly involved Liam throwing a plum at Noel and then attacking him with his older brother's favourite guitar.
And it was the brothers' "wibbling rivalry" that was often more entertaining than their actual music.
Oasis were very much the people's band in the glory days of the 1990s. They formed in 1991 when Noel, who had been working as a roadie for acts like Cork's The Frank and Walters and Manchester band Inspiral Carpets, joined his younger brother's new band, The Rain.
One name change later to Oasis and they were signed to Alan McGee's pioneering Creation Records label. Their rise was spectacular and swift.
Their first three singles, Supersonic, Shakermaker, and Live Forever, brought some much-needed punk spirit and rebellion back to the British music scene. To fans, Oasis embodied a canny cross between the rock and pop classicalism of the Sixties and the confrontational edge of punk.
On its release in 1994, their first album, Definitely Maybe, became the fastest-selling debut album of all time in British chart history.
The release of second album (What's the Story) Morning Glory? in 1995 saw the band enter their imperial phase with a combination of imperious swagger and anthemic rock songs.
A chart rivalry with Blur was dubbed 'The Battle of Britpop' and captured the party mood of the era and Oasis's two nights at Knebworth in 1996 proved they had reached the very pinnacle of success - despite the declining quality of their actual songs.
The Gallaghers' Irish roots (their mother Peggy is from Charlestown, Co Mayo and their estranged father Tommy hails from Duleek, Co Meath) were key to their huge success here and Ireland was quick to claim the biggest new band in Britain as our own.
Early Irish interviews with Noel and Liam were full of tales of munching Silvermints and Tayto on their childhood holidays here and both brothers have always been keen to big up their connections with Ireland.
Oasis played their first Irish gig in September 1994 at the now sadly long-gone Dublin venue The Tivoli and returned many times to play bigger venues, including as support to R.E.M. at Slane Castle in 1995, two nights at The Point in March 1996, Páirc Uí Chaoimh in August 1996, and Lansdowne Road in 2000, before bowing out in style by headlining Slane in 2009, just three months before they split up.
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However, the rot had set in long before that. The friction between Noel and Liam saw line-up changes following the departure of founding members Paul Arthurs and Paul McGuigan in 1999 and the bad blood between the brothers curdled.
After such spectacular beginnings, it was to be a slow, agonising decline for the band. Their latter albums, Heathen Chemistry (2002), Don't Believe the Truth (2005), and Dig Out Your Soul (2008), were mostly made up of turgid dad rock and their live shows began to lack spark and excitement.
So why are they reuniting now? Recent words from both Noel and Liam seem to suggest a degree of détente creeping into their combustible relationship and they are releasing a thirtieth-anniversary edition of (What's The Story) Moring Glory? next year.
And, of course, then there is the money. Reunion shows in London, Manchester, and a two-night stand in Croke Park on the 16 and 17 August could net the brothers £50m, something that will certainly make Noel's £20m divorce from second wife Sara Macdonald a whole lot less painful.
There is also the not inconsiderable matter of Liam and Noel doing right by the most important woman in their lives - their mother Peggy.
Tickets for Croke Park go on sale at 8am this Saturday, 31 August, from Ticketmaster.
