Antinomia: FF6

And one thing he's got to report is the state of Vector, which was wiped off the map in WoR.  It's weird that the original game barely touched on the Empire just... ceasing to exist, though everyone I suppose was more worried about Kefka.  But here, since Leo's still out there somewhere, it's gonna be a bigger deal.

... Which means I need to really nail down WHERE he is and what he's doing, since I'll need to code another entire original event to get him back, and since next stop is Setzer, which I'm not planning to do much different with, that's gonna be coming up soon as an availability.

Someone in Tzen (or perhaps it was Albrook) does mention that 'on that day' there was a vortex that sucked everything into the center of the continent.  The presence of Magitek Factory elements and Imperial Palace suggests that Vector was crushed by this debris and became part of Kefka's Tower.

Just keep an eye out for strings that mention that if you're removing that element from the Empire's fall.

Code:

[caption #2232]

On THAT day, debris from all over the world floated eerily to the center of this land mass, and formed that tower_

The string's relative position suggests WoR Albrook.

EDIT: As for places to reintroduce Leo... hmm...
WoR Albrook doesn't have any recruits in WoR and you said you passed it, so that might be a good place to put Leo.  Narshe is already character-bloated and so is the Maranda-Jidoor-Zozo continent (though Cyan takes both Maranda AND Zozo, so maybe another recruit in Maranda could work).