Slitherine

A guy is asking this question in the Steam BA2 forum but I don't know what to tell him-
"Is there a way to play the multiplayer scenarios against the AI?"

It's doable, but he/she would need to be quite familiar with creating their own scenarios, as they would have to give the AI side appropriate orders so that they behave sensibly. It would also probably be highly unbalanced as a single player scenario, so the AI side would have to be given extra units or other advantages to make it an enjoyable game. Basically you would be creating a new scenario, but with the advantage that someone else has started it off for you!