Meanwhile the instagram account kraelauzon has posted (below) a few short videos and identified a new Autobot, new Decepticon and verified the rusted VW van is a Decepticon. As the first two vids below shows, we have Bumblebee and Hound with an unknown jeep sandwiched in between. The Decepticons also seem to have their own formation (3rd video). At least in past Transformers films that was essentially an "Autobots roll out" formation which leads me to think that Jeep is an Autobot (I would say Hound but that name is taken) and the motorcycle is a Decepticon. In addition she posted a picture of a green construction type vehicle with the Decepticon logo on the door.
Also there are other set pics including a look at the other side of the maybe Wreck-Gar and Hound vehicles via OLV and pictures of what I assume is the unit that Josh Duhamel's Lennox is leader of with the delta-ish symbol on the doors via Transformers Cars.
So to sum up, we have a junk trunk (faction unknown), a green construction truck (Decepticon), rusted VW Van (Decepticon), motorcycle (possible Decepticon), and jeep (possible Autobot) joining Optimus Prime, Bumblebee, Hound, and Barricade on the Transformers cast list.