Add one to the list
https://racer.com/2021/06/10/bmw-confirms-lmdh-program/
https://www.instagram.com/p/CP8d2i2J..._web_copy_link
That's literally all they released so no info about who, where, how many races, etc.
MP also included Lamborghini and GM expected to confirm soon giving us Porsche/Audi/Lamborghini, Acura, and BMW for a total of 7 chassis options with 4 constructors.