I could see the spirit hitting here, the vintage, and the mutant.
No proof just a hunch based on design and:
The Zen line needs a hybrid (sanded) I could see the spirit being that
Mutant Wolverine could be the s77 response hybrid cover on the wolverine, would would make the name make sense. Clicked the link, it's s70 pearl, which is a repeat of the original...LAME.
The vintage is a urethane with the aspect core-might be good...