These are really nice, and the person who took the photos has them in very high-res. I really like them, in one it looks like the Hot Wheels car called Muscletone and more 4th gen like than the finished concepts and in the other it looks 2nd gen.

 

A bit too bland for my taste.

 

Very true, but nice artwork I haven't seen before. I like the 4th gen looking one, but at the same time, it is bland and doesn't look new OR exciting.

 

The first one looks kind of familar, but then again, I have seen so many renderings of the concept now that I can't remember fully. I agree, it does kind of have the Muscletone Hotwheels car vibe to it.

 

I think the drawing were based on this Camaro Concept that never made it. Around 2004-2005 I think when Ford Mustangs sky rocketed. Or maybe I'm wrong? What do I know?

 

I see Scott's signature on the 1st one with a date from '07. I believe they are from GM. I recall that at some point a group or 2 of these drawings were auctioned off last year and if my memory is correct, they are drawings from the design team(s) that were involved in the final development of the Concept's design.
If I'm correct, these would be fairlly significant as they depict part of the evolutiony process leading up to the final design.
Somebody here has to have a better handle on just what these renderings represent!

Best regardSS,

Elie