The ADAC GT Masters season starts this weekend and the entry list is - as far as I can see - close to complete with 9 brands in total:
http://www.adac-gt-masters.de/de/starterliste/
Enge, Frentzen, Kox, Gavin, Buhk, Winkelhock, Rast, Bleekemolen, Seyffarth, Engel, Hürtgen, Renauer, Baumann, Engelhart Thiim, Keilwitz... lots of quality in the field this year!
Races are on SAT and SUN at 12 CET (live on kabel1).