I think he knew about it, just nothing about it.
It would go something like this.
Random Person: Hey Vince, heard of this Pirates of the Carribean movie?
Vince: They made a movie about that? How about that.
Random Person: Yeah, it stars Johnny Depp.
Vince: I don't know who that is.
BS on that one. From one of his old Playboy interviews, Vince McMahon lists Edward Scissorhands in his top 5 favorite movies at #3. Goodfellas was #1.