It's a side fetish so it won't be added in most places. I can't promise anything but it'll definitely be used somewhere down the line. Also you're correct, that's their current end. :)
Ah okay, that's a bit of a shame. How much of a side thing? like will it be a spin-off for giantess? (like hyper-blank for the other routes)
A side fetish meaning it will only be used in specific story lines or as a secondary to the main fetishes. Hope that makes sense.