Age of Empires World Domination announced. Trailer inside. please look at the forum in which this thread is posted first.

[Kresnik]

JEMC said:

After that reveal, they also said that they were working on a PC Rollercoaster Tycoon too.

http://www.computerandvideogames.com/455415/rollercoaster-tycoon-4-confirmed-for-pc-will-be-different-from-ios-game/

Yup, I'm aware.  That seemed like a knee-jerk damage-control announcement rather than anything else, though.