We do we go from here?
That's correct; his thought was that if AI turns out to be on the dark side, the human race may be at risk.
AI imagine things most times that a human being may not imagine; Elon said "they think far beyond themselves." But I still believe there is no way AI can outright or override human; although they are machines built with some super technology, humans can still destroy what they create afterwards if they become too powerful. I just say what I think, though.
There's a proverb that says, "An okra plant doesn't outgrow the person who plants it; no matter how tall it grows, when the owner wants to harvest it, they still bend the stems down and harvest the okra."
If AI becomes a threat to humanity, the people who built it can destroy it.
That's the video where Elon speaks about the AI threat: https://youtu.be/Qj-iz6MByZg