They won't care.
They will see it as there democratic right for the good of the community to destroy it because they have made such a pigs ear of the whole thing.
The council hate anyone benefiting from a public site and they hate it even more when they look clueless pillocks when a project fails.
You will need to start moving now to get assurances that it won't be raped in the middle of the night because once they do it thats the end of it. They will put the reaper through it, then drill it and then plough it. It will take months of compressing just to get the surface back again never mind a stable grass cover. And the longer you argue about it with nothing being grown on it the topsoil will get washed away and then youhave even bigger problems. The council won't have any money to do it and there will be some health and safety rubbish why the locals can't do it for free.