The bodywork (skin) would have been different on the Dodge Viper for sure, however, I think the article was really referring to the frame, suspension, dimensions, etc. as the new Viper and as far as that goes, it would have made a great GEN V. The look on the SLS is definitely M-B as I am sure they took the original Viper design and then M-B'd it. once they got the design transferred.
All these newer cars I seem to need to see in person to form a proper judgement as the angles, etc. do not come through on a two dimensional picture. The dimensions on the SLS in pictures just do not do it for me, but I am sure in real life, it will be ****. Personally think the SLS prototype convertible is a much sexier car.
Sometimes too much thought can be put into something and ruin the product. Case in point, someone stole the Green Day Album and then they had to go into the studio and pound out a new one in three days (American Idiot was one of the new classics) No thought, just stick to the formula and do it. Spontinanity is good.
Sounds like the GEN V had to start from scratch as the proposed design was taken away. Now they need our input as they have been soliciting so this is a good thing. A two year hiatus to sacrifice to get the car we all want. Sounds good to me.