Given that a coupe version of the 650 horsepower supercharged, 200 mph capable monster was revealed at the 2011 LA Auto Show, plus the fact that archrival Chevrolet chose that venue to introduce a convertible version of it's 580 hp Camaro ZL1, there's every indication that a drop top version of the Shelby could make it's debut at NAIAS 2012 in Detroit next month.
If that proves to be the case, then it will be interesting to see what specifications it will sport. One thing's for certain, it'll weigh slightly more than the coupe and likely have it's top speed limited, possibly to around 180 mph, since going that fast in a four-seat production convertible, especially a Mustang convertible is a rather unnerving proposition to begin with. Stay tuned for more details.
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