coda — A coda is a separate passage at the end of something such as a book or a speech that finishes it off.
conclusion — When you come to a conclusion, you decide that something is true after you have thought about it carefully and have considered all the relevant facts.
culmination — Something, especially something important, that is the culmination of an activity, process, or series of events happens at the end of it.
famous last words — A notable final utterance before death, especially one made by a celebrity or historical figure.