Being obsessive about both superheroes and politics, I created timelines for both Batman and Superman, comparing them to shifts in US politics, society and culture to see how the two heroes have been affected by their times. The stories are on Shorthand:
This was actually made for a talk I was giving at the British Library but I ended up not using it. I found a crowd sourced database of everything the Daily Mail says cures or causes cancer (or frequently does both) and started to see certain patterns. So I visualised them.