Joined Cases C-684/22 to C 686/22, Stadt Duisburg (Loss of German nationality: Judgment of the Court (Fourth Chamber) of 25 April 2024 (requests for a preliminary ruling from the Verwaltungsgericht Düsseldorf - Germany) – S.Ö. (C-684/22), N.Ö., M.Ö. (C-685/22), M.S., S.S. (C-686/22) v Stadt Duisburg (C-684/22), Stadt Wuppertal (C-685/22) and Stadt Krefeld (C-686/22) (Reference for a preliminary ruling – Citizenship of the Union – Article 20 TFEU – Nationality of a Member State and of a third country – Acquisition of the nationality of a third country – Loss of the nationality of a Member State and of citizenship of the Union by operation of law – Possibility of applying to retain the nationality of the Member State prior to acquisition of the nationality of a third country – Individual examination of the consequences of the loss of the nationality of the Member State in the light of EU law