Fan Casting ''The Last Son'' in Batman V Superman: Dark Knights of Tomorrow

In the Post-Credits Scene for this film, we see that same multiversal entity speaking with the variant of Superman from Earth-49, who leads The Regime of that universe. The Monitor explains to Kal-El what is happening on Earth-1610, and how the very fabric of the multiverse is slowly becoming undone, due to the great lengths that the Batman of that universe wants to take by conquering the multiverse and bending it to his will. Clark Kent, despite wanting to acheive similar goals for his own Regime, agrees that the Bruce Wayne of 1610 needs to be put to rest, and if there's anyone who can pull of the task, it is him.