Following the 2021 German Bundestag elections, which parties will be part of the new government?
With Chancellor Angela Merkel stepping down, her party, the Christian Democratic Union (CDU), and Germany in general face an uncertain political future (Euronews, Deutsche Welle). The election is scheduled to take place on 26 September 2021 (Bundeswahlleiter.de, Politico.eu). Members of other political parties joining a government would be immaterial. If, by 31 December 2021, no election is held or new elections are called with only a caretaker government put in place, the question will close as "No government will be formed before 31 December 2021." "The Green Party" means the Alliance '90/The Greens (Bündnis 90/Die Grünen).
NOTE 16 April 2021: We have added language to two of the bins to make them more clear.
NOTE 16 April 2021: For the purposes of this question, a "new government" is formed when the chancellor and the cabinet are sworn in.