For the very reason you mention "backyard" rivalry. That would not be a guaranteed win, rivalries are often unpredictable due to the intense emotions surrounding the game. I don't see how it would benefit our program to develop a rivalry with a local G5 program. We recruit many of the same kids, yes, not necessarily our starters, but certainly our very important role players and second string kids.
I don't even like this future 4 game series, we should not be giving them any platform. Temple I believe is the 28th largest university, 300k+ living alumni, sitting in the 4th largest TV market, have put about 1 billion into that campus taking over more and more of the surrounding neighborhood, and with a possible brand new 35k on campus stadium expandable to 40-45k, I just don't see how that helps us. I hope this stadium never gets built and they decide once and for all to drop football.