Hmmm...I had meant this story only as a throwaway, one-line answer to the short fiction challenge; but I am beginning to see humorous possibilities here:

Dramatis personae:

Dorothy - Lois (of course)

Farm hand / Scarecrow- Jimmy (If I only had a brain!)

Farm Hand / Cowardly Lion - either Jonathan Kent (based on his appearance and on the fact that I could easily see him acting in the role) or Cat (based on name -- but then with her it would have to be "If I only had a man")

Farm hand/Tin (Steel) Man - Clark Kent / Superman

Wicked Witch of the East - Lex Luthor

Wicked Witch of the West - Tempus

Aunty Em - Martha Kent

And in keeping with Frank Morgan playing multiple parts in the original WoO:

Glynda (Glyndus? ;-)), Professor Marvel, the Wizard - H. G. Wells

The Munchkins -- the shrunken folks from "It's a Small World After All"?

I can't think of many animals having been depicted on the show, so casting Toto is hard -- perhaps the pig from Smart Kids?

That's not all of the characters, but it is certainly a majority of them. I also couldn't quite figure out where to place Perry. He really ought to be in there somewhere.

The more I think about it, the more demented this crossover seems...

cheers,
Lynn