If a redevelopment corporation fails to substantially comply with the development plan within the time limits for the completion of each stage, reasonable delays caused by unforeseen difficulties excepted, or violates or is about to violate ss. 66.1301 to 66.1329, the failure to comply or actual or possible violation may be certified by the planning commission to the city attorney of the city. The city attorney may commence a proceeding in the circuit court of the county in which the city is in whole or in part situated in the name of the city for the purpose of seeking appropriate relief. The court shall, immediately after a default in answering or after answer, inquire into the facts and circumstances in the manner that the court directs without other or formal proceedings, and without respect to any technical requirements. The court may join as parties any other persons it deems necessary or proper in order to make its order or judgment effective. The final judgment or order in the action or proceeding shall dismiss the action or proceeding or grant appropriate relief.