To change one's tune typically means to change in a more positive or agreeable way, but in this sentence the change is more negative
Context: "Ok, in your next book instead of making the gamble you  make it so that Ray is portrayed in an even more negative light as a cross between Clauswitz and Gandhi."
Hypothesis: Ok, in your next book the gamble you rather change your tune and ray is portrayed as a cross between clauswitz and gandhi.
Based on the context, is the hypothesis true, false, or unknown?