No Al Pacino movie should ever be remade. At least not his great ones. I think no one would wish for Serpico remake with Colin Farrell, or Scent of a Woman with Harrison Ford. Pacino made Scarface the movie it is.
But don't you see the irony of your post? Pacino's "Scarface"
was a remake. And some would argue that Paul Muni's "Scarface" was superior (although I'm not one of those people).
That being said, I agree that this story doesn't need to be retold for a third time. It's time for Hollywood to get original.
