I think we'll get atleast one DLC, maybe the last one. It's the last gap in DLC numbering (X10.bundle is missing).
My bet is we will get American vehicles pack with American vehicles.
Still waiting for CO response, not everyone's wishes... though I do wish Airports and Train Terminus... anyway... one can keep dreaming.
From here: http://forum.paradoxplaza.com/forum/showthread.php?795412-So-nothing-new-for-CiM2We still have plans for Cities in Motion 2!