The lawsuit claims the album wasn't selling as well following Joey's 2021 death, so band members Corey Taylor and Michael Shawn Crahan told fans the album was dedicated to Joey and the "realization that Jordison had passed away really 'crept in' while making" it.
What's more, the company claims Corey and Michael lied when they told fans they contacted Joey's family to express condolences in the wake of his death.
It looks like the beef goes back pretty far here -- the company claims Joey's bandmates abruptly booted him from the group via email while he was struggling with acute transverse myelitis -- a condition that caused him to lose the use of his left leg.
According to the suit, Joey and Slipknot subsequently agreed to return all of Joey's property, including his musical gear and equipment -- but the company claims that never happened, saying "at least 22 items" remain in the group's possession, including things like Joey's masks, his iconic Pearl drum set and his Adidas sneakers.
The lawsuit says some of those items are part of the display in the band's traveling museum, known as Knotfest.
After the complaint was filed, Slipknot responded with its own legal docs ... denying the claims and asking the court to dismiss the lawsuit.
As we reported, Joey died in his sleep in 2021, according to his family ... and the 911 call, obtained by TMZ, revealed a woman who said she was Joey's ex getting emotional while telling dispatch about the warning signs that pointed to his death.