With the JL-Alpha's time machine unable to reach the 853rd century, Superman Secundus is able to punch through the time barrier to bring the Legion back to the 853rd century. They arrive in time for Superman-Prime's arrival and the final destruction of Solaris.
Due to the JL-Alpha's inability to reach the 853rd century, Superman Secundus finds an alternative method to transport the Legion through time, arriving just in time for Superman-Prime's appearance and the ultimate demise of Solaris.