Chris Cornell also promises that the reunited grunge band will deliver a 'very rich album'
The grunge legends help wrap up the tenth annual festival
Singer reckons that a lengthy break gave the band new inspiration
'Live To Rise' will feature on 'The Avengers' soundtrack
Reunited grunge band join Bruce Springsteen and Paul Simon in headlining London festival
Singer will follow Soundgarden's European run with four solo shows
Singer covers Led Zeppelin and John Lennon on forthcoming LP
Frontman says he wishes he'd stuck with piano lessons at an early age
Kim Thayil says band want new songs to 'excite them'