Board Thread:Questions and Answers/@comment-24389799-20140106201520/@comment-15636815-20140108021141

The developers add buildings to the game all the time. As for when, or how many, or to which theme, no one here can answer those questions. The developers do not monitor the Wiki.

The developers do monitor the TrainStation forum. You may wish to ask your question there, especially in the thread called "Which buildings should we add", though you may wish to browse through the questions and answers already in that thread, just to see if they have already answered your question.