Since a few cars now have the ability to wheelie themselves, even without the drag cars, I think a universal wheelie bar that could attach to the tow hitch would be really nice to have! Also a height adjustment for the wheelie bar would be nice, so that we can set the car to minimum wheelie height to do an even faster 1/4 mile.
That will most likely come in the near future, and even tire temperature simulations, to effectively burnout with Drag Slicks to get them to stick to the road, trans brakes... It will pretty certainly, be added in the future.