It's the climax! All points and plots converge on Shockwave, revealing the truth about the Dark Cybertron prophecy. Nothing will be the same, with (at least) one major Autobot dying, (at least) one major Decepticon defecting to the other team, and the fate of Cybertron being completely up in the air. With everyone back in one place and a major threat looming over all of existence, how will things play out? Real cool, is how they will play out. And we talk about them at length.
Also: the return of the ice cream truck that tends to over outside Greg's house!