If these had been sequels instead of remakes, I would say it's more likely, but since these are indeed remakes I find the possibility waning.
Because of the timeline distance, and the physical distance between the regions, if there was "3rd version convergence," the 3rd version would have to be drastically different from XY: connecting it to a team that has been defunct for many years already messes with the plot behind XY, moreso than the differences between DP and P.
I will admit, though, that the titles using Omega and Alpha definitely call up some similarities (AZ, and just the use of another alphabet in general) between ORAS and XY. I definitely remember reading some theories that "instead of Z, we will get Alpha and Omega" before the ORAS announcement, so until we know what kind of game(s) we'll get next we can never really be quite certain. Doctor brings up the interesting possibility of a prequel "3rd version," and that's always an option, too!