Cybertron, the original home of the Transformers, was destroyed in DOTM. But was it the ONLY home? The TRANSFORMERS: CYBERTRON show holds an interesting angle: the Ancients, the earliest Cybertronians, travelled in their ships to about four different planets: Earth, the speed planet Velocitron (populated by hot wheels), the jungle planet Animatron (populated by animal-formers) and the engineering planet Gigantion (populated by giant city-formers). These worlds became the homeworlds to new generations of Transformers, each with their own unique nature. They could use this angle in the TFilms: the Dynasty of Primes, or more likely the Allspark travelled to worlds before their final fate on Earth; establishing new generations on these new worlds, whom then arrive to Earth to offer assistance. We could have city-formers (Metroplex, Trypticon) and most obviously animal-formers (Dinobots, Seacons, etc) appear perhaps in a reasonable and logical manner, without convoluted explanations and stuff.