Maybe there's a situation where Sparkeater has some sort of connection to an ancient Transformer technology. Brainstorm accidentally stumbles upon this connection while doing some research. This leads to a race between the Autobots and the Decepticons to either use this connection to their advantage or destroy it before it causes more chaos. The Transformers have to deal with Sparkeater's attacks during this race.
To develop Sparkeater, you could give it some unique abilities that are not just about destruction. For example, it could have the ability to communicate in a very strange way that the other Transformers don't understand at first. Brainstorm can be developed by showing his internal struggle. He wants to solve the problem of Sparkeater but he's also afraid of the consequences of his inventions. The other Transformers can be developed by showing how they react to Brainstorm's plans and to the threat of Sparkeater, some being more trusting and some being more skeptical.
One plot idea could be that Bumblebee and Arcee have to team up to protect a powerful artifact from the Decepticons. They start off not getting along well due to their different fighting styles, but as they face challenges together, they learn to respect each other and become a great team.
One idea could be a story where Predaking and Shockwave are forced to team up against a common enemy. Maybe a new, powerful threat has emerged in the Transformers universe that neither of them can face alone. Their different skills and personalities would create an interesting dynamic as they learn to work together.
One plot idea could be that Bumblebee and Wheeljack have to team up to rescue a group of Autobots trapped by the Decepticons. They use their unique abilities, Bumblebee's speed and Wheeljack's engineering skills, to outwit the bad guys.
A story could revolve around Ravage and Soundwave exploring a new planet. They discover strange new forms of energy or technology. Ravage is eager to investigate up close while Soundwave is more cautious. Their different approaches lead to some tense moments but also some great discoveries. As they interact with the new environment, they also learn more about each other and their own capabilities.
One idea could be that Perceptor and Rodimus are on a scientific exploration together. They encounter a strange new planet with unique energy signatures. Perceptor is excited to study it while Rodimus is more concerned about potential threats. As they work together, they start to understand each other's perspectives better and form a deep bond.
Perhaps there's a situation where Cliffjumper is captured by the Decepticons, and Soundwave is assigned to guard him. Over time, they start to have conversations that make them see each other in a new light. Cliffjumper might learn about Soundwave's motives that are not entirely evil, and Soundwave might start to respect Cliffjumper's courage. This could lead to a change in their relationship and potentially even an alliance of sorts.
One idea could be Elita One leading a secret mission to uncover a long - lost Autobot technology. Another could be her forming an unlikely alliance with a Decepticon who has a change of heart. Or perhaps a story where she has to protect a human who has a special connection to the AllSpark.
One idea could be a story where Optimus Prime has to team up with an unlikely ally from another planet. Maybe a small, scrappy alien that has some unique abilities that can help in the fight against the Decepticons. This would add an interesting dynamic as Optimus has to learn to work with a very different being.
One idea could be that Prowl and Bumblebee have to team up to solve a mystery on Cybertron. Maybe there are strange disappearances and they suspect a new Decepticon plot. They start investigating together, with Bumblebee's energetic nature contrasting Prowl's more reserved one, leading to some humorous and tense moments as they try to figure things out.