The electric vehicle (EV) pioneer's stock is at risk of taking another big hit if Musk and his team don't overdeliver on Q3 results -- or at least earnings call data.

A new design ethos was on full display at the Tesla Robotaxi event, offering some not-so-subtle hints of what to expect from a future sub-$30,000 Tesla.

Along with the robotaxi, Tesla is expected to provide updates on its humanoid Optimus robot — after all the event is titled “We, Robot,” a reference to Isaac Asimov’s seminal work I, Robot . Tesla might also show one of its mystery vehicles — a van or a cheaper car that could compete with China’s growing affordable EV market.