More than meets the eye

There are many rumors circulating about this upcoming live-action + CGI movie. Although they did officially announce at Comic-Con that Peter Cullen, the man who voiced Optimus Prime in the original cartoon series, will reprise his role for the movie. This is good news for the fans of the original (Generation 1) series, especially with the rumored new design of Optimus for the movie:

This supposed new design is particularly displeasing to fans, as we're all quite used to how the original Optimus looked, and considering the "promo" model they used, it seems strange that they would go with this new design (which looks more like the Armada version), with flames painted on the sides... Personally, I think flames would not fit Optimus Prime's personality, and I obviously don't like the look.

Other rumors include Bumblebee being a Camaro instead of a Beetle, and Megatron being a tank rather than a pistol. I can't fault them if Bumblebee doesn't look like his cartoon version in robot form (and if the pics I've seen of the yellow robot in the movie is indeed Bumblebee, he doesn't), since even the original toy for Bumblebee looked nothing like his cartoon version in robot form, but I don't see why they would not keep him as a Beetle. It's not like it can't be done or something...

The only thing I can think of is if Volkswagen objects to having their vehicle used in the movie. But why the hell would they do that?