"fuck endgames, because the only endgame in life is death"
couldn't have said it better myself!
I have three answers, which I am ordering from most friendly to most hostile. Anyone who has perused the site much will likely not be shocked that I respond the way(s) I do.
1. It will be fluid, and dependent on local conditions what happens. Humans, as living beings, are always evolving, and will continue to do so. Anarchism is a process more than an endpoint. We will adapt. Sometimes we will fail. Sometimes we shift gears (either slowly or quite suddenly) to meet our needs on the ground. Sometimes (well, always) we will die. Sometimes we will turn on each other.2. Since the process is ongoing, we can't know, and those who would offer you an endgame or a complete vision of the future are nothing other than snake-oil salesmen. Caveat Emptor.3. The very idea that anarchists would hope for a utopia, or ascribe any particular value to ideas like "human nature" is ridiculous. If one is going to use the term anarchist to describe oneself, I think it is important to not lose track of the fact that the very etymology of that label we are choosing to take up is posited in terms of opposition and negation, not in terms of a positive or forward thinking plan.