The Istanbul, Turkey leg of the upcoming Live Earth global spectacular has been cancelled.
Local media suggests the 7 July (07) concert failed to attract sponsorship or promised financial support from the Turkish government.
Tickets had yet to go on sale, although major Turkish stars including Mor Ve Otesi, Sebnem Ferah and Hayko Cepkin had agreed to perform.
Officials will instead erect giant screens so locals can gather to watch the global warming awareness gigs.
The 24-hour Live Earth concert series will begin in Sydney, Australia and continue across the world with events in Japan, China, South Africa, Germany, London and Brazil, before concluding in New York.
Corgan took to Instagram to confirm rumours of new Pumpkins material, saying the first songs could arrive as early as May.