Close to nobody, perhaps. But I, for one, have reached out and offered to help under precisely those conditions. The Amiga was once very special to me, and I think it would be cool to work on the OS now that I have 20 years of experience developing for mainstream commercial platforms. It wouldn't be about money or glory. Just fun! 
Hats off to you sir!
After reading 5 negative opinions in a row from Kolla it is nice to see someone thinking of taking action and doing something positive.
There has been an insane amount of work done setting up the wiki with all the developer documentation. It would be nice to see some of that good work being leveraged. By whatever camp.
Cheers!