Hopefully I can get this right this time!

Via TFW:

The official Transformers Facebook page has updated, today showing off the Target exclusive releases in the Age of Extinction line. The exclusive releases that will only be available from Target in the US include the following:

Voyager Grimlock and Deluxe Optimus Prime Two-Pack - Grimlock is the Fall of Cybertron toy, with a Generation 1 style deco. Optimus Prime is a silver chromed version of the Dark of the Moon Deluxe Optimus Prime, armed with one of the Generation 1 Predacon swords.
Construct Bots Grimlock and Optimus Prime Two-Pack - A set of the Construct Bots Age of Extinction Grimlock and Dinobot Rider Optimus Prime, with Optimus Prime once again in silver.
Smash and Change Silver Optimus Prime - The Age of Extinction Flip and Change / Smash and Change figure, redecoed in grey. Notice a trend developing?
Titan Silver Optimus - last but not least, the Titan Optimus Prime figure is also done up in silver as a "Silver Optimus", in this case it's a flat silver figure and largely completely unpainted save some gold effect that almost looks like yellowing.

The theme of the Target exclusives definitely seems to be based around offering "silver knight" versions of Optimus Prime.
The highlight is definitely the DOTM Optimus and FOC Grimlock set, though the fact that they're releasing Constructbots Grimlock in unused G2 colours will be of interest to some. The less said about the Titan the better.