Instead, Tempus' essence was split in two and a Time Slip was created. Kylie Griffin and Isaac swapped places in the time stream. The Ghostbusters attempted to trap the past Tempus but it escaped the Ghost Trap and fled the Firehouse in confusion. He wandered to Times Square, where his future self communicated his mission to him: release all the spirits from the Containment Unit and fulfill the Great Spirit Uprising.
In the future, a prophecy foretold the return of Kylie Griffin and she would deliver humanity from the tyranny of Tempus. The Ghostbusters attempted to rewrite the future and send a Proton Pack to Kylie. Both Tempus' tried to prevent this but Kylie was able to secure one thanks to Garrett Miller's quick thinking. She followed instructions left in her diary to confine Tempus as the site of the Firehouse. Once the others did the same with the past Tempus, the Time Slip reopened and Kylie merged the two in the present/past. The Ghostbusters then successfully trapped him and the Time Slip closed, restoring all to their proper place. Tempus was then put into the Containment Unit, thus it was never destroyed and the Great Spirit Uprising never happened.