By Joseph Salvador A deal for Durant would reportedly be as costly as another superstar’s trade back in 2019. With Kyrie Irving’s status up in the air, the Nets may find themselves in a worst-case-scenario situation. If the star point guard were to leave the team in free agency this week, Kevin Durant could grow unhappy in Brooklyn and seek a trade elsewhere. And any deal for the two-time champion would be absurdly steep. According to the The Athletic’s Alex Schiffer, a source told him “look up the Anthony Davis trade to the Lakers and start there” when referring to what Durant would cost in t…