Yes true, but it's just another repaint. We've never had a purpose-made Taxi TF mould. And IMHO TFP Bumblebee as a taxi doesn't work all that well; it's basically a muscle car with taxi decos on it. There's no retooling to add a taxi roof light. At least Overcharge had a roof light (even if it was purely because the original of the mould was a police car - it's nothing more than a full white strobe light).
The issue would be for Hasbro to acquire licensing rights from those respective copyright holders. Although it'd be neat if Hasbro could do say Transformers based on the 1959 Cadillac Eldorado and DeLorean (Generations Swindler anyone?) -- then fans could customise them as the Ecto-1 and Back to the Future DeLorean (I could imagine some 3rd party making an add on back with different versions of the Flux Capacitor etc. to make the DeLorean Time Machine look like how it did in the various films).
That was again something I thought was really cool about the first incarnation of Movie Bumblebee as the Monaro.I remember how excited Aussie fans got when news about that first hit the net.
BigTransformersTrev: do you mind if we also discuss non-vehicular alt modes (e.g. beast modes) that we'd like to see in this thread too?