: If Ch5 is "the true timeline", it will be the only reason why both
: Earth and Mars are destroyed I know. Perhaps people in K'lia are only
: survivers.
: But on the other hand, if the failure branch of Ch4 is "the true
: timeline", it is Hathor's fault.(But if it is, where are
: nightmares...? )
Ch5 end in is a different timeline from the prologue. If the sphere had exploded, there would be no Earth there in the sky, no K'lia, no sun; the galaxy would be exploded.
Ch4's failure dream is in the same timeline as the prologue, but later, after "Near Side". Hathor returns to the moment after you and she departed and goes crazy.
The devastation in the prologue is just due to the war and to S'bhuth going mad.