This process went along fairly well without any surprises and afterwards I re-installed the door and began to fit the mating edge to it. This rabbet will mate perfectly with the right hand door edge. Rather than concern myself with a slightly wider left hand door I add a lip of the same wood and grain orientation to the inner edge of the left door instead. This allows me to create two identically sized door panels and since veneer is involved, the complexity of the process is simpler if the door panels are of equal dimensions.
I currently have the left hand door rabbeted edge in the process of glue-up and afterwards I will perform any small trimming to ensure the fit is perfect between the doors. There is a small, slightly greater than 1/32 in. gap between the doors at the moment which will have less of a reveal apparent once the lipped edges are created and installed.