Which Ultimate(s) Would Theology without Walls Be About?

PRECIS:

Is there a possible shared intentional object or objects across the religions about which you could construct a theology without walls? I suggest five possible answers to this question, from the perspectives of ultimological exclusivists, inclusivists, first-order pluralists, second-order pluralists, and error theorists. I conclude that a theology without walls will need an argument against ultimological exclusivism and error theorism and that it might take different shapes depending on which of the other three perspectives we adopt.