If Donnie Walsh returns, which is up in the air at this point, then you'd expect Mike D'Antoni to return. With the state of today's NBA, where agencies like CAA, which represents Calipari control things like never before, it's easy to speculate that the former Nets coach could find his way to NY if both Walsh and D'Antoni don't return and the Knicks find themselves with thin sideline options.
Calipari is a great recruiter, but hasn't won anything despite constantly loading up teams with NBA talent. He also had 2 Final Four appearances stripped while the coach at UMASS and Memphis. His one effort in East Rutherford was an utter disaster.
He's simply not the guy to lead the Knicks into the future.