The Paris Motor Show is taking place this month and we've already seen Volkswagen and Lamborghini introduce eye-catching new vehicles in preparation for it. A week from now, Elon Musk's Tesla is going to join in the new-car fun by unveiling "the D and something else." That's presumably in reference to a new Model D that would join the current Model S and X options on offer from Tesla. As to the "something else" portion of Musk's teaser, your guess is as good as ours — it could be an upgrade to existing Teslas, an even more advanced infotainment system, or an electric bike to go along with the company's all-electric cars. One thing's for sure, though: it probably won't be a hydrogen car.