The Art Spore is a spore for art topics. The Great Art Appendix is intended for topics that might be excluded from Wikipedia by the notability criteria, but which can both add to and utilise Wikidata items.
Information on particular artworks
Such a Great Art Appendix can provide a space for narrative pages about individual artworks which are held in collections (as has been proposed in Wikidata's WikiProject sum of all paintings) or which have existed as public art, but for which there is insufficient documentary evidence to sustain a Wikipedia article in themselves.
Mapping contemporary art practice
Notability criteria such as those linked above provide coherent and consistent norms for the encyclopedia. A rather traditional strong institutional foundation is sought as assurance of the subject's lasting significance. However, if a substantial proportion of artistic activity is outside these norms, can a complementary initiative take on a role in capturing the currents, their ebb and flow, the ways in which different streams come together, break their banks, fertilise and dissipate over a long or short time?
Artists' pop-up spaces
Galleries and artists' projects fall under notability criteria such as those on en.wiki. Art practice over recent decades has involved temporary pop-up spaces. In the encyclopedia, articles on even quite well-established galleries have had difficulty showing sufficient reliable non-local 3rd party coverage to demonstrate they should survive a Deletion discussion. Can a complementary project capture a mapping of these spaces over time?
Spaces and networks
Pop-up spaces may at least share venue characteristics similar to those of a conventional galleries, but temporary event and community based projects may not do so. Today's artistic activity can be community based, can intervene in social movements, can involve transient production and dissemination of multiple objects without exchange value, or orient towards craft traditions. Can a complementary project deploy an understanding of network interventions, possibly using resource points in the related Civil Society Spore, Org Spore and Event Spore?