Maybe some day somebody releases a "GuidedComicBook" spec, which is just a container with images and a text file listing views per image.
I'm not sure how difficult will be to support something like that in KO but it should be trivial to do it with a webview on regular OSes.
With the plus it fallbacks to regular cbz/cbt/cbr if the text file isn't found.
The hardest part would be to convince people to use the new format, as always:
https://xkcd.com/927/