Sounds like fun! It should be achievable, with tightly-defined expectations and scope. A fully or partially visual development environment might encourage more people to get involved (such as GB studio, gdevelop, defold, scratch, etc).
I had one thought for a lower-stakes way to try spinning this up:
What if the initial goal was to create a micro-game or interactive game-like moment, with a single interesting concept, mechanic or mood? It would function like a window into a game world, featuring the music and imagery.
These mini-games could either be super simple, or small slices of something much bigger, but they would be *finished* quickly either way. If people enjoyed the process enough, new ones could be devised.
There is more potential for diverse experimentation in sound, image and game design using this approach I think. The ideal scope would probably be similar to a typical 2-day game jam at the most, just in terms of hours invested for development.
Finished games could be posted to itch.io or something, been wanting an excuse to play with GB Studio... :-)