Well to give you the short version of it... The fwc found a broken down exo. The fwc had a device that could predict the future. Every future they saw was taken over by the vex. The human mind was too weak to use it however. They asked the exo to enter the device and implied to travel. Kabr last said that if he spoke again it would be with a new voice. It's believed gee didn't die only got flung into the future, possibly in doing so lost his mind. With his new voice he led a rebellion against the nearly lost future.