The next set of blind-bag Kreons were shown off at the recent NYCC in America, and now Hasbro have released official images on facebook.

These are the ones that were historically themed (6 characters in 2 different costumes... so Hasbro can use up some of their D&D parts a bit more).
The six characters are Optimus, Bumblebee, Megatron, Starscream, Ratchet and Shockwave.
Being in costumes, and with most not having Microchanger versions, this set is non-converting, so are being officially called "Warriors" instead of "Microchangers".

TFW have mirrored the images, but forgot one, so until they add the second Starscream, the Transformers facebook page is here (scroll for the images if they've added more since these).