I think that most jurisdictions already have the legal tools they need to put the public good in front of special interest groups, in the form of eminent domain laws.
It's just that the policial will is just not there.
Really this is a case where states should pre-empt localities.
I don't understand what point you tried to make.
Fair market value is what you expect to pay anyway, and the point of eminent domain is not to fleece property owners.
Legal disputes are also not a problem, and quite expectable. It's part of the checks and balances of not having corrupt government officials just steal property to hand it over to the highest bidder.
The key factor is political will. Government officials need to fight to get this sort of project through, and be able to invest their time and effort to navigate political chicanery.