+1.
I know it's been discussed before very often.
I'd like to see oval racing because I enjoyed NR2003 so much. (Which was a big surprise, as I had never been an oval racing fan before I played that game.)
But an extra reason I'd like to see stock car racing on ovals in the game is that it's a great way to highlight the brilliance of the LFS physics model. It seems to me that a poor physics model, like say GT4, can fool people into believing it's realistic when they're driving a car around a track with plenty of corners, because they at least have to make some braking and steering inputs. But when you put a GT4 car onto an oval, it becomes plain even to credulous players that the physics are awful, because the experience is just so dull. (Rubber band trick anybody?) What made NR2003 great, from my point of view, was that it got me to appreciate that there actually is some subtlety and car control required for oval racing: it's not just mashing the loud pedal.
Trying to keep a heavy, high-powered stock car out of the wall on an oval perhaps a bit more interesting (i.e., shorter) than the Kyoto Ring would be one more demonstration of LFS's physics supremacy, I think.