There's way too much capacity in the car building business as it is. Unless I miss my guess, nobody is going to want Tesla's hard assets. Neither GM nor Toyota wanted to be located in the most expensive labor market in the US before Telsa came to save the day by locating in a plant that neither of them wanted any more (Fremont, CA).
The brand itself may be a different story. I'd suspect we'll see a Chinese or Indian conglomerate buying the name and engineering, once the share price gets close to book value (right around $30, as Todd pointed out).