Before Migros bought Denner, there was talk in the media that Migros was planning to open M-Budget stores.
I would welcome it if Migros were to open an Aldi-type discounter (hard discount, not soft discount).
It would also have themed weeks.
The Edeka Group also has several discount stores in Germany: Netto Markendiscount, Np_Markt, Treff3000, Diska