Oh this is a fantastic twist!
/whispers: I got a tad confused when they arrived on Earth. Figured that Tempus had returned to the future, but am now thinking he traveled to our Metropolis. But why did Kal-El then travel back in time? You see?
And on a different note: While reading, I had the following twist pop up: Tempus convinces the Council of Aldruses that they should use their technology to save Krypton. After all, it would be unfair that they get to live in Utopia while Krypton perished.
Thanks for the treat, Lynn!

Michael