Johns, Busiek and Renato Guedes deal with chapter six of Up, Up and Away! in Action 839 (July 2006).
Intergang puts out a huge bounty on Superman, and he spends the early part of this issue dealing with attacks by Riot, Bloodsport, Livewire and Silver Banshee. As they all attack at once, Superman is able to use them against each other, to the delight of the crowd.
With the Sunstone charged, Luthor watches as it draws a much larger Kryptonian artifact to the surface of the Earth.
How, exactly, this Kryptonian ship wound up buried deep inside the Earth is not clear. But the ship looks cool enough, and is a big surprise for Superman.
The story continues in the next issue of Superman.