In movie 1, we got Megatron, Blackout, a Seeker, a Constructicon, a Combaticon, a Casset, and Barricade. Then we got the Constructicons. Besides the Wreckers and Dreads, do you want another group in DoTM?
When robot time has to be limited because of budget constraints I don't want too many groups. It's cool when a character or sub-team you like shows up and does something cool, but if it's just show up a few seconds to get killed or stand in the background then it's just a let down.
If It was possible, I'd like another try with the constructicons. Only this time, more screen time, dialouge and the ability to fight back.
Long Haul shot down a helicoptor, Mixmaster knocked the flag off a bridge, and Rampage beat up Bee, but that's pretty much it.
oh ok. aerialbots then. we already have silverbolt anyways, why not go the distance and complete the circle?