Really awesome stuff! This is probably not even a bug, just really low priority, but I noticed that when I enter the vault and click on Batgirl, clicking on the various costumes doesn't populate the screen with selectable scenes. Works for me for Black Canary, Huntress, and Zatanna, so I figured I'd just make the observation.
Once again, really great work!
I've only read back a couple pages, but it sounds like ReImagined is trying to be more of it's own thing, and not necessarily trying to recreate every scene/piece of dialogue from the original? If that's the case, it sounds like it would be easier to not necessarily try to bring over the code, and instead (since the sprites were more easily extracted), develop the story in your preferred direction and not have to be beholden to "salvaged" code? Which I personally would be all for: Some of the capture targets in the original feel very copy-pasted from each other (both in terms of personality, and how the scenes play out). I understand that making sure each character had the bare minimum same scenes was a natural outline to follow to fill out content, but it did feel like characters the original Dev wasn't a fan of got a bit short changed (might also be since the premise of having the MC be Lex limits some interactions).
BTW, some lovely quality of life changes you've done on ReImagined! Love that the map has highlighted locations (every time I come back to original SU after a while, I'm always having to scan my cursor back and forth just to remember where everything is).