Sounds like a very interesting project. I won't be able to participate, already working on some other interesting projects at the moment, but wishing you all the best. Will be interesting to see how this will turn out, and if it will work out the way you intend.

For me, being a co-author would mean to be more on an equal footing from the start, so I don't think this approach would really work to get my best work there. But then, there are many different ways, so wish you all the best in your endeavor!