greement can be reached,  the concepts that have already been
examined, described, defined/partially defined, axiomized, etc. can be
properly placed in the new ontology.

This is not a merger of existing ontologies.  It is the creation of a
new ontology -- and where appropriate,  using some of the content of
existing ontologies in a principled way.  If the concept(s) and its
relation(s) have been considered for use in one ontology, the
intellectual capital this represents is a huge advantage over starting
f