Saw this on tfw2005, of an ebay auction of Hasbro concept art from the 80s. It's a Gen1 Twintwist with a pretender shell drawn behind it. A proposed concept maybe, during the pretender era that never made it? We know that the pretender concept was wrapped up early, with some prototype shells on display at BotCon 94, but could using actual Gen1 toys in pretender shells (like a reissue concept) be a direction they were heading in the late 80s?

http://cgi.ebay.com/ws/eBayISAPI.dll...m=230295102876

I think it is the same seller who has been listing Hasbro concept artwork on ebay for a number of years now, so should be legit. Judging by the price, it better be legit... US$1200!!!