VAN HORN, Texas—Following the contrail blazed by “Star Trek” actor William Shatner to boldly go where few celebrities have gone before, two more honorary guests of Jeff Bezos’ space tourism venture Blue Origin are ready to take a free joyride to the final frontier. The company’s New Shepard rocketship is due for liftoff from Texas at 8:45 a.m. Central time on Saturday, with  TV personality and retired NFL star Michael Strahan strapped in beside the eldest daughter of the late pioneering astronaut Alan Shepard. After a launch delay of a couple of days due to high winds, weather for the new flight time is looking favorable, lead flight director Steve Lanius said on Friday. “The launch crew is ready, the vehicle is ready, the crew is ready, and New Shepard is go for launch,” he said in a Blue Shepard webcast. The spacecraft itself is named for Alan Shepard, who …