No takers, huh? lol
I guess we just trow ideas for now. I think that, if we really want it to be made, we need to have some of us to write complete stories (I mean just 2 or 3 pages, not real scripts). Then take the best ideas for a final story that please everyone. That would be a good start.
But franckly, making hours of good, coherent, CGI movie would required an incredible amount of time and coordination efforts that I am not sure we can achieved, even with all the best intentions.
But maybe we can focus on making a nice short movie that shows some good ideas of what could have been the prequels, I don't know.