Although the fate of the four-by-four is still uncertain, Land Rover will reportedly debut a concept version of its next-generation Defender SUV at the fast-approaching Frankfurt Motor Show.

The Defender has been a staple of the Land Rover lineup for more than six-decades, but more stringent emissions regulations have put the next-generation of the rugged truck in question. However, Land Rover will at least test the waters with a new design concept set to debut at the Frankfurt show.

The concept is intended to show Land Rover is serious about replacing the Defender, but the British automaker will also use feedback on the concept to judge if it’s on the right design path. The Defender has retained the same general look throughout its lifespan, but the concept is expected to take on an LR4-inspired design.

The case for the next-generation Defender hasn’t been completely made, though, as Land Rover needs the SUV to sell in annual volumes between 60,000-80,000 units. Last year the Defender tallied just 18,000 global sales.

If given the green light, the new Land Rover Defender will launch in 2015.