...why didn't Hasbro just use the movie as a way to upgrade the existing characters while also introducing new ones? It's simple, really. Optimus is heavily damaged in battle with Megatron. The Matrix upgrades him to a new body (Powermaster without Hi-Q, maybe) and Megatron becomes Galvatron. A few TFs could have died, but fan favorites like Ironhide, Ratchet, Wheeljack, etc. could have received new bodies and thus, new toys. Hod Rod and company could have still been introduced, and Season 3 could have divided time between a team on Earth (the new bots, maybe) and the original-yet-restored cast returning to Cybertron in the wake of the defeat of Unicron and the Decepticons. This way, new toys could have still been made, no childhoods would have been destroyed, no kids would have locked themselves in closets, and very likely, the series would have continued on beyond Season 3.