As I often work with multiple parties (often primarily online), and need to drive towards a resolution (e.g. converging on a final content), I can be observed using a Single Text Negotiation approach. See " Single-Text Negotiation" | M. Shane Smith | July 2005 at https://www.beyondintractability.org/essay/single-text-negotiation .
Ideally, the single text would be facilitated by an independent moderator who shuttles back and forth between parties. Less ideally, one of the content creators picks up the mantle, and start running towards some goal posts. If the other parties appreciate that the the individual is acting on behalf of the collective, progress for everyone can be accelerated. If one individual gets too far ahead of the others, there’s lots more sensemaking and renegotiation that should take place.