I’ve seen several charity anthologies or boxed set recently, such as this one benefitting RAINN and this one raising money for juvenile diabetes research. These are lovely projects and reflect incredible generosity and hard work from everyone involved.
But I have a suggestion: the organizers for the next charity anthology should recruit a bunch of very famous authors, put their names on the cover but publish the stories (or novellas or whatever) unsigned.
The speculation about who wrote what would be intense. Additionally, the pseudo-anonymity might push the authors involved to write outside of their usual style, which might be interesting for everyone involved. It would only work if the authors were all very high-profile and had very distinct voices, but the hook might lead the project to be super successful.
Just a thought.