DTM will have its own GT4 series in 2020 as a support for their calendar.
It sounds bold with ADAC GT4 present, but I BELIEVE this replaces the Seyyfarth r8 cup series from 2019, which ran 12-15 GT4 R8's this year, so chuck some BMW and Astons in there and you have a race.
https://sportscar365.com/other-serie...-support-bill/