Doubt it though the current model is unquestionably a much better car. Probably won't be any petrol in 40 years time so they'll all be static displays...
All modern GT500s are produced by Ford SVT, not Shelby.
Shelby did make some of his own such as the CS6 which used a V6 but Shelby was increasingly about exploting money and profit, not the integrity of the cars.
Tsk....no wonder 'ol Carroll didn't leave you anything in his will
Without a time machine or a crystal ball, it's difficult to say. I'm sure they will be collectible, but will they reach the giddy heights of the classics? Dunno. Lets just enjoy 'em now