That looks alot
like the Shelby GT500 KR.
While I like the look, unfortunately, it appears too similar to the current Mustang, as well as the "tuner versions", and consequently, it isn't a big enough change to improve sales.
Personally, I like the current styling of the Mustang. I've always said, the only Mustang I'd consider owning was the one featured in 'Bullitt', and the current Mustang is the closest interpretation of that Mustang.
It'll be interesting to see what Ford does with the Mustang once the Camaro and Challenger arrive.