Final answer:
Indeed, some early church fathers developed detailed eschatological systems as part of their theological work, which is true.
Step-by-step explanation:
Some early church fathers indeed developed detailed eschatological systems, engaged in theological debates, and helped to shape early Christian doctrine. It is true that they pondered on various religious concepts, including eschatology, which deals with the end times and the final destiny of souls. Figures such as Irenaeus, who wrote extensively about Christian theology, and Augustine of Hippo, with his work 'The City of God', are examples of early theologians who contributed to the development of Christian eschatology.