I want to know the answer to the following question:
Which Prussian chancellor's motives in the conflict are still disputed?
All the background I'm provided with is that "Some historians argue that the Prussian chancellor Otto von Bismarck planned to provoke a French attack in order to draw the southern German states—Baden, Württemberg, Bavaria and Hesse-Darmstadt—into an alliance with the North German Confederation dominated by Prussia, while others contend that Bismarck did not plan anything and merely exploited the circumstances as they unfolded.". Is that enough to answer the question?
Answer: yes