Yes, there might be a couple of superstars available in the open market next summer, including LeBron James and Paul George assuming they decline their player options and/or don’t get a contract extension.
Yes, there could be other supernovae players (to the extent you can consider them that at this point in their respective careers) hitting free agency, such as Klay Thompson, and James Harden.
Also true is that the best big man granted to be available on July 1—no tampering—will, at least for the next three weeks and change, still be a member of the New York Knicks.