The BoR is set in stone. It can not be changed. the notion that it could be is contrary to the entire spirit of the Constitution.
The only active limitation on ammendments is found in Article V, no ammendment may deprive a state of its "equal suffrage in the senate" without its consent. While I agree that repealing any of the bill of rights would not be in agreement with the original intent of the founders, we have a government (and apparently a people) which is not terribly concerned with original intent.
There is nothing within the Constitution to prevent repeal of any or all of the bill of rights. No, the only true safeguard of our rights is in the people.
I don't know how well it would "play", but I thing the case can be made that the Second Amendment is an exception. The phrase "the right to keep and bear arms shall not be infringed" could be read as disqualifying any attempt at repeal. The amendment to repeal would be unconstitutional from the outset.