So, what you would like is an episode centered around Vehicons. Okay. Cool. Although, I doubt the Autobots would slaughter them like there's no tomorrow. Not unless there were no other options.
Well, I've a few plots in mind myself. Warning! Cheesy ass titles! Also, a lot of my "stories" include introducing new characters, which I seem to be obsessed with and can't shake off.
Prowl and Silverstreak pursue Mindwipe to Earth. While the two take short refuge among Team Prime, Silverstreak is hypnotized by Mindwipe to join his cause.
While Prowl has the background of cyber-ninja here as an Animated homage, I didn't need to go into depth about him. However...
I thought Silverstreak could take on the new characteristic of being the Transformers equivalent to Hawkeye. He carries around a crossbow with a quiver on his back. His appearance is a slightly altered Smokescreen (like Smokey is of Prowl) with silver and black replacing white and blue respectively.
Mindwipe obviously pays respects to his G1 incarnation, but I haven't decided on making him a beast or a jet.
Regardless, Mindwipe would be a rogue 'con (what an original idea), but wouldn't join Megatron's team. Instead, he remains alone.
I also thought of having Smokescreen run off with Prowl and Silverstreak for obvious reasons. I just haven't thought of how to work that into the plot.
You already know where this is going.
Ratchet repairs and runs off with Wheeljack, leaving the remainder of Team Prime without a level head. Together, the two discover an Autobot within a stasis pod. They open it up to reveal Grimlock, the Dinobot leader. Except, the other four Dinobots are scattered across the country. The three form a trio and search for the other Dinobots over the course of the season, while Wheeljack constantly whines that he'd rather work alone.
I have a lot more...but they'd only fit somewhere if there's a fourth season.