There have been plenty of NBA superstars throughout the league's existence, but only 12 can make it onto the all-time All-Star roster.
To determine the select few, standard All-Star selection processes were used.
The starting five are comprised of two guards, two forwards and a center. The guards and forwards are allowed to play the same position if necessary. These starters were also determined not only on their production but also by their overall popularity in an effort to emulate the fan voting.
The remaining seven—two guards, two forwards, one center and two players of any position—were determined on merit alone.
If this team actually existed, I'd give up quite a bit to actually watch them play. Something tells me that you would too.