No it would be like a Chevy Trans Am. If they do come out with a `Cuda they should revive the Plymouth moniker and sell it from Dodge dealerships. It would then be a truly unique vehicle.
Remember the `Cuda was shorter then the Challenger and had different sheet metal then the Challenger. For me to step up it would need to be more then just a grill,tailpanel, stripes and decals
For me to buy:
Revived Plymouth badge for that car only (Chrysler owns the rights, that's why GM shelved Pontiac and did not sell the name so that they could come out with niche performance cars).
Sheet Metal differences
Power plant unique to the `Cuda ( a 7.0 or how about a V-10)