What's in the lantern?

Good question. [Link]

[T]hat's three out of eight batteries powered by dead bodies. This, of course, begs the question: are there corpses in the other batteries too? It's never been clear what was in the green battery, and of course the yellow, blue, indigo, and orange batteries are all mysteries.

So do they have dead bodies inside? Is the corpse of some hopeful chap whose luck finally ran out floating in the blue battery? Is the body of the most avaricious being in history locked inside Larfleeze's little lamp? Or are these bodies we've seen laying around just coincidences? I'd imagine not; Geoff Johns doesn't do coincidence...

Hmm.