Nissan may finally be ready to expand the Leaf family.

The Leaf Nismo concept isn't the only new Nissan we'll see next week at the Tokyo Auto Show. The Japanese company has published a brief teaser video to suggest it will use the biennial event to showcase its long-rumored Leaf-based crossover.

The video shows the dark outline of a vehicle that looks considerably bigger and more rugged than the humble Leaf. The four-door model stands out with a fastback-like, BMW X6-esque roof line; it's ready to tackle the production version of Volkswagen's ID Crozz concept, which debuted earlier this year at the Shanghai Auto Show.

That's all we know about Nissan's next concept at this point. It will presumably borrow its powertrain from the brand-new second-generation Leaf, meaning it will receive a 40-kWh battery pack and offer up to 150 miles of driving range. Of course, Nissan could equip the concept with the so-called long-range drivetrain it promised to roll out in the not-too-distant future.

Nissan has talked about expanding its family of electric vehicles since the original Leaf made its debut in 2010, and the crossover segment seems like the right place to begin the offensive. The segment is booming in key markets like the United States and China, and crossover fever has spread to the wagon-crazy European market.