"I'm here," and he speaks slowly, deliberately, "because after we went to that other world I told you about, after I'd watched every step my double made in agonizing detail, we all came home." And the word 'home' has strange echoes around it. Like he's not sure he has a home anymore. For anyone who knows Superman, knows Clark, it's very telling.

"And when we came home, the Justice League looked at me differently. They'd seen what could happen when I changed sides... and they were afraid. I will be honest and admit I don't know who came up with the idea, but they eventually decided that if I was going to live on the planet they'd sworn to protect" their planet, never yours, Clark, always an alien, "that they needed insurance."

He held up his hand, his pointer and his thumb an inch or two apart.

"A Kryptonite capsule, yay big, that I would swallow. And every week, a different League member would carry around the trigger mechanism, good to work anywhere in the world."

His eyes closed and his hands lowered.

"I decided to come here when Batman" and his voice hitches, a swallow, "when Bruce agreed to build it."