OKAY HERE GOES
Lelouch is dead but not yet dead, dead. His soul was dead and only left his vessel (body), but CC wants him not dead so she pulls him out of the C's World that led that world to be buried in time with no God. Now, this fracture of Geass nation is somehow can prelude time but gets owned by CC. The woman who has a Geass to prelude time becomes trapped to her deep sleep after Lelouch finally resolves once again his true intentions as Zero and solved her Geass problem and taking over the C's World, which actually come true (by theory). Lelouch dumps her little sister over CC because they are now both immortals and then live happily ever after.
2 immortals living forever rather than choosing Nunnally!
DAMMIT LELOUCH! NUNALLY JUST WANT HER BIG BROTHER WITH HER!!!!!