The only things we see while being pulled through the Rift is the past though. We don't see anything of the bad future.

The only being that has ever been said to have the power to see the future in any way is Alexander. And even that isn't really seeing the future; he's calculating it in his supercomputer of a brain. He doesn't even need the Rift to do so either. It's intrinsic to his powers of the Primal of Time Manipulation.

If I had to take a guess, I'd think the Amdapori saw something similar to Ultima, The High Seraph.