The Movie look to the characters is probably why there aren't any toys... at least for the launch of the show in October. Since we haven't seen any toy concepts at all, there probably won't be any toys for at least a year (which would be after TF3).
The designs will at least be able to sell the Movie toys, and the Movie toys will help sell TFs:Prime, without having to produce a whole new range of toys. Kids and parents will still recognise the forms in the toys as being in the Movie and Prime and buy them reguardless of what the packaging says.