If you read enough DCU comics, you inevitably start coming up with explanations for certain quirks of the DCU - backstories that you KNOW will never be told, but fill in the gaps in a pleasing way. Here are a few of mine:

1) Lobo, a pasty white destruction machine, is the universe's attempt to make up for the retirement of Destruction (himself a member of a pasty white family).
2) The 'H' in the H-Dials stands for "Hypertime."
3) Gabriel Walker was responsible for returning Jonah Hex to the 19th century after his "Mad Max"-style adventures in the "Hex" comic.

What are yours?