You would need to be able to control alot more than just the AI, you would need to be able to control how the other players play through your area of land. DOTA wouldnt have worked if I could take my lvl 10 Tauren and walk onto the map and start killing things. They needed the power to make sure people playing it were playing by their rules.From what I've seen them say is that the AI tools , everything will be available, I'd take that to mean you can change rules and yes run your own server or at least continent using the tools. Real money will be involved I'm sure with your own continent . but they've got to make money with it.
Essentially to run your own server where peoples levels and abilities are set by you and their progression controllable by you. I don't see it happening.