The court may appoint a successor guardian or conservator prior to or at the time of a termination. A successor guardian appointed prior to a termination shall be immediately empowered to assume the duties of office but shall be required to file the requisite oath, post any required bond, and complete mandatory education, if required by the court, within thirty days of the termination of the predecessor. A successor guardian or conservator shall succeed to the powers and duties of the predecessor unless otherwise ordered by the court.