For Nemesis Prime, we get a look at his partner, Giza, whi is a bird that transforms into his sword. This is another reference to yet another Nemesis Prime, in this case the one from the Prime line which had a transforming sword partner with the same name (although it was a shark, and not a bird).
We also get the (slightly obscured) bio which tells us that this Nemesis Prime is simply an evil clone of Optimus Prime. For Wreck-Gar, we get the character art that will appear on his packaging.
You can see actual images of these previously revealed toys here and here.