I wouldnt get too excited about leader starscream yet. A lot can happen between now and what we actually get on the shelves. Im expecting major cut-backs and penny-pinching to happen, ala usual hasbro.
Im betting the paint will be a sea of grey, the transforming arm will get axed or at least overly simplified and the alt mode will take a hit for a cheaper and more simplified battery housing unit.
Not trying to be a kill-joy but this is what usually happens.
Just look at leader prime. Originally he was gonna have articulated fingers, collapsable wheels and a hinge on the tool boxes on his legs which took them out of sight, and a good paint job. That was all featured on an image exactly like this claiming to be "box art" for the production toy (i think you can still find it on the back of the boxes today) but none of those features made it onto the actual toy.
Time will tell i guess but im not holding my breath.