Why would he? Other then maybe Deadpool, there are going to be new actors playing the Mutants not the Fox ones after Secret Wars.

I think so

The writers of Deadpool & Wolverine said that the idea is using Cable with Brolin again.

Lol only Ryan and maybe Channing will get to reprise their roles

Why?

Cause even if the fox version dies they won’t recast him aka it’s like a gamora situation where it looks the fox one but he has lived in an origin integrated in the Mcu

Maybe. He said he wasn't happy with his role in Deadpool 2, so might want to come back so he can do something move interesting with it. Or maybe it put him off altogether.

Josh said he wanted and signed to reprise Cable in more films.