Of the new Transformers merchandise at Toy Fair 09 were a set of key chains, with their front designs pixelated out to prevent revealing the details of the characters. Action Figs have posted a gallery of these with the noticeable Bumblebee, Starscream etc — there are two notable oddities however, one mysterious unnamed ‘New Character’ and a figure labeled as Optimus Prime that doesn’t match his usual robot form. TFW also have a pair of silhouettes that match these two designs.
The source of these silhouettes states that the robot form of Optimus Prime is in combination with Jetfire, looking closely you can see the wing outline, boosters and a canon — this combination has previously been seen on the Legends class toys, although that arrangement looks very different.
The unnamed character has claws and is grey, I’d hesitate a guess at Megatron.