He wasted two chances....
At the last, surrender yourself to your greatest fear knowing it will destroy you. I want to say that this would have been not destroying the shadow ships in 406 Into the Fire knowing that it would destroy Centaury Prime. Yet this is his FINAL chance at redemption, meaning the other two should happen first. So it probably means letting G'Kar kill him. Then again if we watch the series in order, and it is letting Centaury Prime get destroyed by the Vorlons, it would be the last of the three prophecies we see fulfilled.
Scott Baker <email@example.com> asks:
> Didn't Londo have a prophecy about not killing the one who is > already dead? So, with the flash forward in WWEII we see him > sparing Sheridan, thereby avoiding his fate, right?
The goal was to *redeem* himself. Sparing Sheridan was part of that. Then he had to surrender himself to his greatest fear: his death at G'Kar's hands.