To comment on the designs, HOLY GOD THEY LOOK REALLY REALLY AWESOME!!!
... Ok calm now.
Something interesting I noticed about them is that it looks like you can see the energon flowing through their bodies. I first saw this with Soundwave and then noticed that the others have the same look. Could be a new element to game play or just a cool design choice, either way I like it. And if there is going to be toys of these I can't wait to see how this "energon flow" will be done... light up leader class figures!