Wis. Stat. § 221.0704

Subject to the approval of the division, one or more banks may consolidate or merge into or with an interim bank organized under this chapter under the charter of either the existing bank or banks or the interim bank in accordance with the provisions of this chapter for consolidation or merger of a bank. The division shall promulgate rules providing for a simple process for the organization of interim banks under this chapter. The rules shall permit the organization of an interim bank with a minimum of one director.