I still think they need to start now if you take into account the lack of knowledge about MMC in the 'real world' (i.e. non-Mog circles).
My feeling is the average person is unaware Morgan still make cars, so even if Morgan goes through a re-brand and then launches it in the style you mentioned near the end of 2008, I still think it will come as surprise to 99% of the automotive buying world
