I agree that we're at a slump in nba super stardom phases and decades go.
Durant, Davis, Harden and Westbrook are leading a hard charge but it will be a few years before any great Lebron or Durant challenger arises.
I think there will be an evolution of superstars soon enough- the 7 foot + ball handlers that grew up watching Dirk and Durant will appear in large numbers like crop of Thon Maker, Karl Towns body type.
highly skilled hybrid bigs that can shoot, dribble and score at will...essentially playing all 5 positions on the court.
On a side note I believe muiday in this upcoming draft may be a bona fide NBA superstar.