Teleology and Theology

Kant's characterization of the concluding sections of the 3rd Critique, starting at #79, as an "Appendix", suggests that the main theme of that section, Moral Theology, is an extrinsic afterthought with respect to the study of Teleology that precedes it.  However, a preview of that Critique that he presents in the 1st Critique indicates that, quite to the contrary, the inverse is his priority.  For, there, he projects the completion of the Critical trilogy as answering the question "If I do what I ought to do, what may I then hope?" (B833), via a presentation of Nature as a system of the "purposive unity of all things" (B843), which "in its widest extension becomes a physico-theology." (B844)  In other words, as fascinating as it is, his examination, in the 3rd Critique, of the role that Teleology plays in the development of Natural Science, is, qua part of his system, no more than an extrinsic prelude to his explanation of how the object of Hope--Happiness, which is a natural event, can be conceived as purposive, i. e. as a reward, the cause of which is a God, the existence of which is necessarily posited by Reason, according to the 2nd Critique.