Wis. Stat. § 843.08

If the defendant is entitled to have the lands described in the complaint or any part thereof condemned for public use, the defendant shall set forth the facts and the purpose for which the lands are required. If no proceedings for condemnation have been instituted and the defendant is authorized to condemn such lands and intends to condemn, the court may stay proceedings until the defendant can, with due diligence, institute and complete condemnation proceedings; if the plaintiff is entitled to judgment, the plaintiff shall have costs.