[quote=@Revans Exile]
<Snipped quote by TheUnknowable>I use human to refer to any picture that is not their costumed appearance.

<Snipped quote>Just take whatever you assumed they died of and change died to weakened or rendered unconscious.

Or this: Darkseid uses the equation to turn heroes, civilians, and villains alike into mindless slaves. 

<Snipped quote>Forgot to change that.

<Snipped quote>I assumed they ascended to a form of life unbound by the physical, they died, or went to another universe.

The truth: Although it is not made clear in "Destroyer" what happens to Luthor and Darkseid, Dwayne McDuffie has stated that they were both absorbed into the Source Wall.

<Snipped quote>In the DCAU Kal-El & Kara In-Ze have the same familial relationship as you and I do. The "cousin" thing was pure fiction to help establish Kara's human identity.
[/quote]

Ok, Kryptonian healing trances all around.

As for Darkseid and Luthor I'll say they were made into non-physical beings, then reversed it to become physical again, but immortal.

I didn't know about the "adopted cousin" thing.  Most of the time she's named Kara Zor-el.  This Supergirl is different, though.