Ultimately, it's a matter of when, not if. Fenway won't stand forever. So with that in mind, it is imperative that they get the new ballpark right, from the location, to the design, to the name.
As I mentioned before, the worst thing they could do would be to build a replica of Fenway Park and name it Fenway Park. It would do a disservice to the legacy and memory of the original. They should build an entirely different ballpark (while keeping it in a retro stye). No Green Monster, etc., just a whole new ballpark, with a new name. Imagine a waterfront location with the skyline as a backdrop?
A Brave New World, indeed.
That said, I'm all for getting every last game we can out of Fenway. I love it, warts and all.