While the Fisker Karma and Tesla Model S are targeting different price points, it appears Tesla's third model will compete against the Nina lineup for more mainstream consumers. Just how cheap will Tesla go? Nissan Leaf pricing?
http://blogs.edmunds.com/greencaradvisor/2010/04/teslas-musk-says-crossover-4wd-in-the-works-with-new-arrivals-in-2013-and-2014.html
http://blogs.edmunds.com/greencaradvisor/2010/04/teslas-musk-says-crossover-4wd-in-the-works-with-new-arrivals-in-2013-and-2014.html

Edmunds said:Tesla's Musk Says Crossover, 4WD in the Works, With New Arrivals in 2013 and 2014
Tesla CEO Elon Musk reiterated his company's ambitious plans for growth on Tuesday afternoon in Detroit, and the Roadster is just the beginning, Autoweek reported Wednesday.
The Model S is due in 2012, and Musk says the company is narrowly focused on getting that sedan to the market on time. The car will start for less than half the price of the Roadster and is expected to sticker for about $50,000, including a federal tax credit.
About the same time the four-door arrives, the first generation of the Roadster will cease production after the 2012. A year or two later, a successor will launch, Musk said.
More Tesla products are expected to follow, including a crossover. Look for new arrivals of vehicles in 2013 and 2014, "which is a rapid pace," Musk said
Four-wheel drive will also be a characteristic of future Teslas, he said.
The Model S will have a range of 300 miles, five-star safety ratings and the ability to swap out the battery in a minute. It will also feature an advanced 17-inch touch screen in the interior, and a large amount of storage space, Musk said.
Affordability is expected to increase with each new product, and by the time the third one arrives, it's expected to be attainable for mainstream customers, in contrast to the expensive, performance-oriented Roadster. About 1,200 units of the two-door are on the road today in almost 25 countries.
Interestingly, Musk said he expects Tesla's most significant impact to be supplying its fresh technology to other companies, rather than through its own products.
Tesla has a deal with German giant Daimler and will supply batteries and chargers for the next electric Smart car. Tesla also will supply electric technology for the Mercedes A-class, which is sold in Europe.
Daimler owns about eight percent of Tesla. The California company also has a deal with commercial-vehicle maker Freightliner.
"The smallest effect Tesla will make will be the cars we make ourselves," Musk said. "The biggest effect will be the cars they [other companies] make."