Well, the question of what is and isn't a rewrite is somewhat subjective. For me, it's whether the author is using the a-plot from the episode, in some form -- a Pilot re-write, IMO, is about Samuel Platt and the attempted sabotage of the space program by Antoinette Baines & Lex Luthor. If Clark is shot by re-constituted gangsters, it's a TOGOM rewrite. If the world is about to be destroyed by an asteroid but Clark can't remember who he is... you get the idea
But there's still enormous range for creativity.
PJ
