Nearly three decades later, the “local artist” has a name. Up until the wife of the man who painted the Big Bat reached out to the Slugger Museum, John Yates’s identity was a mystery.

Just as in their previous single, Imperial Triumphant have tapped Meshuggah’s Tomas Haake to add to the sonic layers that the masked trio laid down on the track. But they weren’t done there, as ...