When the multiverses collide, worlds shatter and heroes from different universes are forced to band together. The Autobots from Transformers Prime, the next generation of protectors from Transformers Earthspark, the charismatic team from Transformers Animated, and Star Butterfly with her allies from Star vs. The Forces of Evil must join forces. An unstoppable force known as The Unifier, an ancient entity with the power to merge realities into one chaotic super-universe, threatens everything they know. Can these legendary heroes rise above their differences and save their worlds before it's too late?