In DTM there were a lot of race cars that never were.
The MG ZT, that was just an intention and a drawing:
https://www.touringcartimes.com/2005...zt-in-the-dtm/ - Here's the DTM MG.
Lexus actually had a running prototype of the IS:
https://www.touringcartimes.com/2008...dtm-prototype/
I also remember an Alfa Romeo 159 that was supposed to be run by a privateer team back in 08 or 09 but I cannot find any picture of it.
From the ITR/DTM days of old, we had the 1997 Zackspeed Calibra:
http://www.speedhunters.com/2013/08/...speed-calibra/
And the Abarth project of the 156 that was supposed to be run in 1997 (From the book "The Abarths after Carlo Abarth"):
https://www.facebook.com/155V6Ti/pos...2472106170683/
Also from the Abarth Book, there were two more Alfa Romeo D2 Cars at least projects (Super Touring):
The Alfa Romeo 164 D2 (Abarth SE059) and the Alfa Romeo 146 D2 (SE061). Both never run and at least the 164 is given as lost forever.
The S2000 category saw the Primera developed by RJN and Pilbeam (project MP89):
https://u.cubeupload.com/arcademygaz/TN012.jpg
And a Ford Mondeo made by Hotfiel Motorsport. I've looked everywhere but I cannot find the picture of it. I'll probably still have them in an old cd stored in the attic.
Most recently the one I can remember is the Mazda 3 TCR