Stop.
9/11 was never predicted, nor was WWII, those were draws of chance and may have never happened if a few thing did not or did happen in the wrong order.
The sun still has ~50% of it's Hydrogen fuel supply available for nuclear fusion into heavier elements to produce light and radiation.
As of now, no alien races have tried to contact us or have been found, this puts the Alien Invasion theory in the lava pool.
A Zombie Virus is heavily unlikely but if it happened, the CDC would have it covered soon...a.k.a. a nuke.
Global Nuclear War is a possible scenario but no one wants to ruin the Earth.
If i forgot one, list it.