Whats your basis? I think the original bb was darn near the current SS.
The only reason I feel like they'd change it is to build excitement about some new alteration or change?
http://www.tfw2005.com/transformers-news/transformers-movie-just-movie-31/transformers-3-autobot-bumblebee-revealed-169651/
It has new side windows, new side skirts, new front splitter, new fog lights, new mirrors, and a new spoiler. Thats too subtle to be just a new concept, I think its got to be a rendition of the new model of some sort.
__________________
2010 Camaro SS modified extensively. I stretched the body to make it a 4 door, but I swapped in the 3.6L DI V6 for fuel economy. Then I picked up a corvette body around the V8. I also swapped the body for a C2 Z28. (In short I traded it for three cars, a Corvette Z06r, a C2 Camaro Z28, and a Cadillac CTS Summer Performance package 3.6L DI with Aisin 6spd.)