Prompt was “Bat-Dan.” I went with Dan, meaning Dane/Danish person. (I know Vikings didn’t wear horned helmets, but it better suited the Batman aesthetic).
I swiped the background wholesale from Batman the animated series and just tweaked the colors a bit. My work is just the Bat-Dan himself.
A viking batman must be in the mythos somewhere, but none come to my mind – I will do a deep dive to look later.