Still, the clock's ticking. We're in a ticket-holder holding pattern. What's on the table are the accommodation plans, travel and time off work for 26,000-odd punters.
Then there's the hospitality folk, security, groundworks staff and roadies. Dealt an unenviable blow, organisers can't afford to kick the can for too long.
On Wednesday last week Diamond celebrated his 77th birthday. To secure someone with the Brooklyn balladeer's appeal, at short notice, is a pipe dream.
Pulling the plug is one option.
The other is to unearth an act of reasonable calibre to ensure a commercially viable billing.
Whoever it is needs to pique the interest of thousands of jilted Neil Diamond fans contemplating their next move.