When Cam Johnson was still in Phoenix, the Suns offered him an extension worth $72 million over four years. He turned it down and now, as a Net, he is a restricted free agent, meaning Brooklyn can match any offer sheet presented by another team.
So far, the most prominent names mentioned as competition for the 6’8” wing are the Houston Rockets and Detroit Pistons, the former more often than the latter. Houston has $60+ million in salary cap space so they can give Johnson a lot of money with some rumors pinning the offer at $60 million over four.