Band's '360' tour is set to gross more than $700 million (£428 million)
Record label set to rely on downloads instead
Nicki Minaj also set to contribute to digital disc
Previews cancelled to allow for overhaul of Broadway show
Find out who is set to play the legendary festival at Worthy Farm
Official opening could now be delayed until June
The Edge makes announcement via London ceremony
U2 frontman sparks outrage during band's South African tour
U2-scored musical has been getting a critical mauling
Safety concerns put off public opening until mid-March