Not sure if anyone has already discussed this but I think that we can resolve which side of the car that GM will put the fuel filler on and not be fooled by the obvious attempt to confuse us in these spy photos.
The spy photo's so far place a cover on both side of the car but the right side would seem to be the obvious location unless they change it just for the Camaro which would seem to be an unnecessary cost. But the fuel door is placed forward of the rear wheel arch if you go by the cladding patch as compared to the actual location on the other alpha chassis mates, the CTS and ATS pictured below.
The bigger patch after the supposed fuel door disguise may be the true fuel door which is further away from the passenger compartment.
The CTS and also ATS fuel door is on the right side as is most of the recent GM cars but not to include body on frame trucks and suv's.