Transformers: Prime: Rising Tide (Transformers Prime x Pacific Rim Crossover)

(Disclaimer: I do not own Transformers: The Orionverse, nor Transformers Prime. They belong to @MelSpyRose and Hasbro respectively)

In this crossover AU adventure for Transformers: Prime / Transformers: Robots in Disguise (2015) as well as Pacific Rim / Pacific Rim: Uprising / Pacific Rim: The Black, the now unified Autobots and Decepticons return to Earth to fight against a new threat which is unlike anything they have seen before.

Years ago, when the first Breach was sealed, humanity breathed a sigh of relief. Despite that, there were fears that the Breach could potentially reopen, meaning the Jaeger program was restarted as a precaution, But now, the Kaiju have returned, bigger and more ferocious than ever. Luckily, the now united Autobots and Decepticons have answered Earth's call for help, for they have finished rebuilding Cybertron.

Together the combined forces of Cybertronians and the human-piloted Jaegers prove to be a formidable force, taking down Kaiju left and right. However, as time goes on, more and more secrets become revealed, which point to a grave threat that could endanger both Earth and Cybertron alike.

Will the humans and Cybertronians be able to discover this threat together and neutralize it in time? Or will they fail and see both of their beloved homeworlds fall?