It will probebly be names Rang Rover Coupe and will have 280HP..
But you can always buy one and name it what ever you want and swap the engine for a chevy LS7 motor and have the 500Hp you wanted in the first place. Heheh.
The car looks really nice as most concept cars do but I really don't think the production model will look that good and very difficult to have it with out the B piller.