Season 8 finale: Clark lies dieing in Lois arms after a brutal battle with Doomsday. She finally realizes that Clark was the red/blue blur the whole time, and only wishes she had told him how she felt before he died saving the city.
Premiere and first arc (about three episodes): show how life without the red/blue blur is like. Dr. Hamilton takes Clark's body to study and try to find a way to revive him.
Crime is on the rise, Green Arrow and the rest of the Justice League come together to try and keep up with it. They all realize just how much of an impact Clark made to the city since no matter how much they try, crime continues to rise now that the Red/Blue blur is gone.
Suddenly a warlord from another galaxy named Mongul shows up to challenge this Kryptonian he heard so much about from another ruler to have met him...Maxima. After learning that he is dead, and out of anger he starts to enslave humanity starting with Metropolis. The Justice League tries and fails to stop him.
Dr. Hamilton has no luck in reviving Clark, until suddenly a shadowy figure shows up claiming to be a being called the Eradicator and his job is to protect the only living son of Krypton. He takes Clark's body, against Hamiltons attempts to stop him, back to the fortress and puts him in a crystal to recharge him.
The Justice League tries one last effort to stop Mongul, but beaten and as Mongul is about to kill the whole lot of them (Green Arrow, Impulse, Black Canary, Cyborg, and Zatanna) Clark shows up mostly recovered.
Finally they battle in the center of Monguls ship, and after a long battle, with some assists from the JLA, Mongul is mostly beaten. Before Mongul can be finished off, he opens a boom tube, and says "You may have bested me, but I'm not the only one to have heard about the Kryptonian who protects Earth. No, my father also has an interest in you boy! For soon, you will meet Darksied and you will not be so lucky!"
This kicks off an awesome final season.