Since it's before the official reveal, it's possible we're just being trolled.
But if that is their real car, I'm only surprised if that was their ONLY car. [EDIT: after seeing more of the car in the reveal...yeah, OK, I'm surprised even though it's not their only car and they will not build this one] But they have said they will have a range of cars, and it does make sense to start first with a halo car (very expensive, low utility - i.e. 2 seats, little cargo space, poor visibility and ingress/egress - some impressive feature(s) that often includes styling, low volume) to generate buzz, build the brand, and guarantee people visit showrooms when they are available.
Logistically, it also helps to start with a low-volume car while setting up supply chain, sales, service, factory lines, etc. And you can get some raving reviews in the media before you start asking people to buy from your brand.
I'm most intrigued by WarpedOne's take on "chain battery". Can you add/remove pieces to adjust cost/space/weight/range/performance without having to change out the entire battery? Could be useful.