I can only think of one so far...
1. A color of Kryptonite besides red or green
2. The undead
Monster Night Fright (is this cheating? o.O)
3. Dean Cain
4. Martha Kent working as a midwife
5. Rosie the Riveter
6. A Pokemon parody/ripoff
7. Lois taking (a) pill(s)
8. A villain from another hero's rogues gallery
9. Clark singing
10. Clark in (or approaching) the afterlife.
Gone the Rainbow (Well he's like, you know, dead. And so technically in an afterlife
I needa read more XD)