How about some theme for the docs. Here are some ideas;
Bippu (or VIP) DLC- cars like the Toyota Crown, Nissan Cima, Toyota Century, Toyota Aristo, Nissan Gloria etc BIG apanese cars, a bit boaty, but plenty of style and power
Classic Japanese - fc rx 7, and older Honda integra, old Toyota supra, maybe an rx5 or 3, corolla KE70 or KE60 etc great classic cars
American, everyone loves the muscle cars, give everyone a chance to drive their dream usdm cars! Stangs, Cameros, stingrays, Thunderbirds, fireworks, Chevelles, gtos etc.
You can do great things with the cars in this game, give everyone's dream a go!
Also you need to fix a problem with some of the driving / drifting game play, it seems tight togue runs and drifting close with AI or other players seems to have a magnet sense about it and sucks you into a wall or the other car or oncoming car?