[quote=@Yahrlan]
Would a tab in the RP thread (like the IC/OOC/Characters tabs) be a viable compromise? Could be 'References' tab? Can be used for world-building, linking to other RPs in the same "series" or world, linking to outside references etc without needing a new sub forum/section. 
[/quote]

That can easily be done by making a post in the OOC/character tab, or even just using the 0th post feature. I just don't think it warrants the need for an entirely new subsection.