This would be a set of eight featuring four repaints of the Masterpiece Rumble mold, and four repaints of the Siege Rumble mold as the nameless generic cassettes in the scene below. Why are the Tremorcons on Earth here and what happened to them next is a story yet to be told. I'm going with the Tremorcons as their identity because of Rumble's piledrivers. I am surprised neither Takara nor Vector Prime have named them already.
The live action movies are leaving that whole concept on the table. Could give Bumblebee a rival character and also ties into the newly implemented BW stuff to upgrade from Wasp to Waspinator. I dont even mind if they vhange the character completely. BB would benefit from having a dedicated enemy character thats as easy for the audience to identify as he is.