As Deadpool breaks records at the box office with “Deadpool & Wolverine,” cover art depicting the of superhero’s first ever comic book appearance could sell for a record $7.5 million.

Jamie Hewlett’s art has always thrived on a combo of energetic chaos and meticulous craftsmanship. From his early Tank Girl work to Get the Freebies, Phoo Action and Gorillaz, his art has ...