I think it'd be easier to divide the content by media type first; as in, you have a bundle for all tabletop/physical games, a bundle for all sound assets, etc.
Then, after that's done, you divide each into smaller bundles that are more specialized, for example by genre (for example, horror TTRPG or one for shoot-em-ups), if the bundles are still too big. Ultimately, I was kind of surprised that you decided to make this bundle an open bundle deal, and I had a feeling that the logistics of it all was going to be difficult to manage - especially considering the revenue share you were proposing.
I have a feeling that you will need to crowdsource the sorting of the bundle to the community, although I don't know how that will be done either. I guess you could retrofit the game jam rating system to instead be used to flag content that would potentially not be appropriate for the bundles.