Thank you both. Your feedback and support means a great deal.
So, I decided that this asset, which was originally meant to be a header hanging over Popeye and Olive Oyl, would look better on its own. That composition is already extremely busy without it, so now I get two pieces for the price of one.
I'm calling this one Muerte. It looks good at its native resolution of 6989x2804, less so when I scale it down to this size, but most of the detail is still more or less readable.