The celebrity trio had planned to give fans of the record-breaking girl group the opportunity to join them on stage as they made their much-anticipated return to the spotlight.
But the plans have been blocked by former bandmates Victoria Beckham and Mel C, who reportedly feared it would "damage the Spice Girls brand", according to Metro online.
"While fans would have preferred to see all five on stage again, the chance to become a Spice Girl was definitely the next best thing," a source said.