Bono says that U2 will release Songs of Experience, the companion album to last year's Songs of Innocence, in 2016.
Speaking to the Irish Times, Bono said: "We're going to get this album out next year; unusually for us, a lot of the songs are done already."
The singer also revealed that the concept behind the band's current iNNOCENCE + eXPERIENCE tour began on the opening night of the 360° tour in Barcelona in 2009.
"360 was a communal experience at its best," he said. "But to be a proper communal experience you have to have the song lines, you have to have the folk songs. If the audience are the centrepiece - and that was the idea behind 360 - then you have to have tunes to sing. The thing is: we had made quite an atmospheric album [No Line on the Horizon], quite a complex piece of work so it was slightly at odds with that."