I'd be shocked if the Nets are able to get good assets for Williams. He's frequently injured, no longer the player he was, and has a big contract. If they want out from that, they either need to take back mediocre talent, or give up good assets (they don't have many, minus Plumlee). Johnson and Lopez are similar - I have a hard time imagining the Nets getting anything that good for them, minus maybe cap relief (though even that would require them giving up an asset, I think).