Re: Earth will fall [SPOILERS]
I still think it makes sense that Harrison is actually one of the other Augments who just took Khan as a title. Meaning: In this timeline, the real Khan was one of the ones who died before he could be revived, and Harrison took over as leader (thus the title 'Khan').
It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shakes, the shakes become a warning. It is by caffeine alone I set my mind in motion.