As we often see in periods of relative weakness in the comics market, the combined share of the Big Two grew.

The Kevin Hart/Brian Cranston-starring dramedy The Upside outpaced expectations, earning $19.6 million and preventing Aquaman from becoming the first DC-based film to top the box office for the first month of its release.

James Wan's Aquaman topped the box office for the third weekend in a row, remaining on track to set a record for DCU films by topping the charts for four straight weekends.

James Wan's Aquaman slipped just 23.5% from its robust debut, earning $51.55 million and easily winning the box office in the final weekend of 2018, a year in which superhero films topped the charts for 16 weekends.

James Wan’s Aquaman, the latest major expansion of the DC Cinematic Universe, earned an estimated $67.4 million over the 3-day weekend, performing almost exactly as analysts had predicted, and appears to be well on its way to reach a $100 million 5-day total on Tuesday.

Let's take a closer look at Goblin Slayer.

These are estimate of the sales on comic books by Diamond U.S. to comic specialty stores during November 2018.

These are estimates of the sales on graphic novels by Diamond U.S. to comic specialty stores during November 2018.

Comics and graphic novel sales were down 13.61% in November compared to the year ago period.

These are estimate of the sales on comic books by Diamond U.S. to comic specialty stores during October 2018.