An announcement rolled into the BlueTower today with news about plans to update RollerCoaster Tycoon 4 Mobile that includes word on the next PC installment in the theme park series. Here's all the publisher still known as Atari has to say about this for the moment:

RollerCoaster Tycoon® PC Game is Coming this Year: We have a new premium PC game in production, for release in Winter 2014. A website and forums will launch soon, where you will be able to directly engage with the RCT Team for this game. Stay tuned for more details.