I think that would be even harder to achieve than a simple unification of QM and Relativity. Who knows what kind of phenomena we don't know about? There could b

I think that would be even harder to achieve than a simple unification of QM and Relativity. Who knows what kind of phenomena we don't know about? There could be millions of theories that are consistent with current physics and still possible, given particular observations. In a few words, nobody can anticipate the kind of phenomena that could be observed by future physicists.