The poster itself features the Autobot line-up, with Optimus Prime, Prowl, Red Alert, Sideswipe, Hound, Ironhide, and Chromia, plus three Tetrajets in the sky behind them, on a background of a burning Cybertron at war. What you might spot in the bottom left corner, however, is a message in Cybertronian (Ancient Autobot script), which we have decoded into 'Light the Darkest Hour' - a clue as to what to next do with the poster itself. Try picking up something to indeed light in the dark, and you'll find another scroll of words, which you can see in the images below - all of which were provided by fellow Seibertronian REX-203!
As we do not want to spoil the fun for those trying at home, we'll be posting the solution in the first comment of this thread covered by spoiler tags! What the solution does suggest however, is that something else is coming...
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