Apparantly, the talks between DTM and SuperGT still seem to go on. At least according to Motorsport-Total:
http://www.motorsport-total.com/dtm/..._12042305.html
For people who don't understand German, the article basically goes like that:
Aufrecht said that ITR and GTA reached an agreement, where DTM-spec cars can compete in SuperGT. Also, two Japanese manufacturers want to build cars according to the new DTM rules from 2014 on. These two manufacturers are Toyota and Nissan, while Honda is a bit reluctant.
My comment: Yeah sure, what should I believe now? I thought the GTA (rightly) rejected ITR's demands regarding the single-spec chassis, and that negotiations had ended. Maybe our friends from Japan can clarify this.