I don't remember the title or the author, but I definitely remember the story. IIRC, it involved a diabolical plan by Tempus and included Lex Luthor, but the story wasn't ever finished. In fact, I think there were only a couple of chapters posted.
I do remember being very interested in it and would love to see it continued.
ETA - OK, this was bothering me so I did a couple of searches and found it. It's
The Kid by Mercy. Thread titles show it should have had 13 parts but only 6 were posted to the mbs.