A couple of thoughts or three.
*This takes 1 ¼ yard of your chosen fabric. Start with 2 yards or even 2 ½ so you have more to tie it together as sashing, borders or binding plus some to make additional or substitute blocks. ***This is of course assuming 10 people participating. Adjust as needed.
*State a finished block size if that matters to you.
*When I've seen this done each person made the same block for the others. They each decide what to make but then made all 10 the same block. I might do all Drunkards Path, Imi does Churn Dash, Plosh does a Star, etc. Just a thought, especially if you're pressed for time in your life.
Odds are better with this crowd but I've never seen everyone finish. That's part of suggesting having extra fabric so you can expand on what you do get.
Have fun!