It is unlikely that any amendment to the Constitution that would pass (or even a new order of government instituted without amending the Constitution, e.g., by

It is unlikely that any amendment to the Constitution that would pass (or even a new order of government instituted without amending the Constitution, e.g., by autocoup or violent revolution) would eliminate the pardon power, though it is somewhat more plausible that it might be made either subject to some kind of after-issue review or made non-unilateral, either generally or in particular circumstances.