OK... I first want to say that this is in now way proven to be true and this is just what I think may happen. Also Im only going with the Autobots for now as I am still digging up info on the D-cons.
Anyway these are the A-bots I think will be in or should be in the next movie.
Known to be in:
Arcee x3 bikes(either Arcee is three bots that act as one or these three bikes are her and two yet to be named bots.)
Silver Corvette: I truly believe this will be Hotrod
Trax and Beat: Could be Sunstreaker and Sideswipe but may not be.
Jazz: very highly unlikely but its hollywood... you never can be sure.
Prowl: sorry guys there is just to many signs that point to him showing up.
Ultra Magnus: again highly unlikely and this one is more of one I would like to see but they could easily hide him amung all the production trucks that move around the cars from set to set.
Saab:Almost forgot about the Saab that is rumored to be in. If it is then it could be maybe... Wheeljack?
And there is still the Volt that we kined of seen with the Autobot cars but dosent mean it is an Autobot but if so then there is yet another so it could very well be more then just 10 bots on each side.