Wait List for Sewer Soldiers “Sacker” 12-Inch Scale Action Figure

I mentioned the Sewer Soldiers “Sacker” 12-inch scale action figure earlier this year, and not is seems that demand is so high that anyone pre-ordering the toy at Cotswold Collectibles goes on a wait list. I’m still a bit confused as to why this soldier has a mouse skull helmet, but I can’t deny that the design is so cool that it keeps attracting my attention. But why that helmet? What’s the story here?