I agree. The Drag Pak cars haven't been super popular either. What made the Demon so popular is that it's a race car you can drive on the street and that appealed to the masses even if they don't race. They just like saying they have one.
If they do have something planned, I hope it's not some limited production deal again. I hate that stuff, but it probably wouldn't make business sense to produce another higher horse power car in mass numbers considering RE isn't selling as well as they thought it would.