Supergroup

There are multiple artists with this name: Apollo was formed in 1969. They released one album, Apollo (1970). Their music was occasionally heavy and the band sounds like Led Zeppelin or Procol Harum, with little bit King Crimson in it. Members have been in other Finnish progressive projects.
2) Apollo Indie Dance / Post Punk band from Ballarat, Australia. They Began mid 2009 when two kids decided to constructively channel their boredom in the form of melodic sound.

G3 is an almost annual live music show and concert tour featuring three select guitarists of the generation; hence its name. It was created by guitarists Joe Satriani and Steve Vai in 1996. Since its inception G3 has featured many guitarists including: Yngwie Malmsteen, John Petrucci, Robert Fripp, Eric Johnson, Kenny Wayne Shepherd, Uli Jon Roth, Michael Schenker, Adrian Legg, Paul Gilbert and many other special guests, including Steve Lukather, Steve Morse and drummer Mike Portnoy. There are three official live releases of G3:

Regents is a DC-style hardcore band, who debuted with a self-titled EP on Lovitt Records in 2011. Members previously played in such influential bands as Maximillian Colby, Sleepytime Trio, Frodus, Men’s Recovery Project, Battery, and Combat Wounded Veteran. Not to be confused with:
A) "Regents," a British act from 1979 who had a brief UK chart career with two singles, '7Teen' and 'See You Later.' B) "The Regents," a US-based rock band from the 1960's

Read more about Regents on Last.fm.

Black Country Communion (originally Black Country) is a band with both American and British rock influences. The seed for BCC was planted when frontman and bass guitarist Glenn Hughes (Deep Purple, Black Sabbath, Trapeze, Iommi) and blues-rock guitarist Joe Bonamassa combined on stage in Los Angeles in November 2009 for an explosive performance at Guitar Center's King of the Blues event. The brainchild of producer Kevin Shirley the band added to its rock lineage with drummer Jason Bonham (Led Zeppelin, Foreigner) and keyboardist Derek Sherinian (Dream Theater, Billy Idol, Alice Cooper).