Of course, but I don't think that's the issue. I think he'd be for going to WWE, but not as just a puppet for NXT to milk their crowd. He'd want to be legit in WWE and I think he's always felt he'd just end up as midcard at best anyway.
Besides, I think WWE do prefer their wrestlers to be just that; theirs and theirs alone. I don't think sharing will be a thing they do very often.