3 Nephi 11
When Christ publicly called Nephi and the others he did do, not as a particular surprise to them, but to show the people who had the authority to do His work. There were many who survived who had been confused among the various religious views that had been taught before the destruction. Thus the survivors could not simply look for the only remaining religious leaders and assume they were right. The same will be true after the destruction before the Millenuim of peace. Christ will come to earth and be acknowledged as the leader, but there will be many religions represented on earth and people will still have choice. The question to wonder about is how the public at large will view the LDS church (and how they will combine with those of Jewish descent).