I haven't made my way through all the threads, but is Super Gt in the works? I love that mod for GTR2, but thinking the rfactor physics might be better.
http://isiforums.net/f/showthread.php/9699-Upcoming-ISI-Content-List About halfway down the list, there is a Nissan GT-R Super GT confirmed to be coming. Not sure when, of course, but there is one being worked on.
Yup, ISI has a GTR in the works, and there probably will be some other third party SuperGT mods out with time. Super excited for the car. I hope they will come out with all the right skins (ie. Motul Autech, Reito Mola, etc) though if they don't I'd suspect they'll come in the form of a third party mod... But more importantly, with SuperGT, we also need a real SuperGT track apart from Sepang. Suzuka anyone?