This is how John Wall dreams N.B.A. draft night will unfold: His suit will be the sharpest of the invited draftees. His mother, Frances Pulley, will shed a river of tears. So will his sister, Cierra. His mentors, Brian and Dwon Clifton, will stand and applaud. His agent, Dan Fegan, will smile. His hands will be firm — possibly sweaty — when they grasp those of Commissioner David Stern.