From Maria's website:
Second half of 2012 schedule
After the Olympics, Maria will play two hardcourt events before the US Open at Montreal and Cincinnati.
Maria will head to Montreal to play the Rogers Cup which begins on August 7th and then try to defend her title at the Western & Southern Open in Cinncinati and that begins one week later.
Maria will then take a week off to prepare for the final Grand Slam of the year at the US Open in New York which begins on August 25th.
After the US Open, Maria will play two events on the Asian leg of the calendar: Toray Pan Pacific Open in Tokyo which will begin on September 29th and the China Open in Beijing which begins a week later.
Maria hasn't officially qualified for the final event of the year at the TEB BNP Paribas WTA Championships in Istanbul, Turkey at the end of October but there is a very strong chance she will with her record so far this year.
Predictable and same as every year but I like this schedule. Only biggest and most important tournaments.