Some photos have surfaced of an unreleased product sample from the pre-emptively ended series of Beast Machines (axed before some toys were released - Battle Unicorn, Megabolt Megatron, Bruticus, Air Attack Optimus).
Megabolt Megatron (the head on legs Deluxe toy) was later released during Robots In Disguise, but if it had been released during Beast Machines as it was originally intended, it would have looked like this.
(pre-production samples are produced for Toyfairs and for use in Hasbro offices to show to Retailers... this is one that ended up in the hands of a toy collector)