I’m not sure if “overturning” general relativity is the appropriate description. We may well find a broader theory which contains general relativity as a limiting case, just as general relativity has special relativity and Newtonian mechanics as limiting cases. With the plethora of experimental verifications of general relativity, however, I wouldn’t expect to see it completely discarded in the way that, e.g., phlogiston theory was.
I’m not sure if “overturning” general relativity is the appropriate description. We may well find a broader theory which contains general relativity as a limiting case, just as general relativity has special relativity and Newtonian mechanics as limiting cases. With the plethora of experimental verifications of general relativity, however, I wouldn’t expect to see it completely discarded in the way that, e.g., phlogiston theory was.