Need a few more breadcrumbs to follow until Elon Musk “unveils the D” (and something else) tomorrow? During an interview tonight at Vanity Fair’s New Establishment Summit, Tesla’s CEO told Walter Isaacson a few juicy tidbits about his news, without really revealing anything — other than what we’ve already seen. According to Musk “One of the things is already there, and people just don’t realize it.” Also, some of the internet’s guesses (dual engine? autonomous driving? AWD?) are apparently on track, as he said people are “directionally correct,” but that they don’t “appreciate the magnitude.” You can watch a clip of of the interview embedded after the break and leave your own theories in the comments, we’ll be reporting live from the unveiling in LA tomorrow night to find out the truth.