Wis. Stat. § 879.57
If it is found by the court to be necessary to appoint a personal representative or guardian and there appears to be no person in the state to petition for the appointment or there appears to be no suitable person to be so appointed, the court shall, upon its own motion or upon the petition of any interested party, grant administration of an estate of a decedent or guardianship of the estate of a minor or individual who is adjudicated incompetent to the interested party or a special administrator, and he or she shall thereupon take possession of the estate and protect and preserve it, and proceed with the administration and with the care and management of the estate. The authority of a special administrator in the administration or guardianship may be revoked at any time upon the appointment and qualification of a personal representative or guardian, or when for any other cause the court deems it just or expedient. Revocation of authority does not invalidate the special administrator's acts performed prior to revocation and does not impair the special administrator's rights to receive from the estate his or her legal charges and disbursements, to be determined by the court.
Wis. Stat. § 879.57