China Open in Beijing a week after Tokyo. It's a tier II, but also very strong (6 top 10 players).
After that it's probably too early to tell for sure...
EDIT: Actually she is on the entry list for AIG Japan Open (tier III) and at least at the moment she would be the top seed there (most of the tour will be in Stutgart) although probably there will be a higher ranked WC or two. Sounds like a lot of tennis considering that a week after that is a tier I Kremlin Cup and Caro has signed up for that too...
I doubt she will play all four unless she loses very early somewhere...
Where do you see the entry list for AIG Japan Open? On the tournament website I can only see last year's particiants.
On Caro's website these tournaments are listed before SEC (I don't know if it's up-to-date, though):
15-21 Sep Tokyo, Japan, $1,300,000
22-28 Sep Beijing, Kina, $600,000
6-12 Okt Moskva, Rusland, $1,300,000
13-19 Okt Zurich, Schweiz, $600,000
20-26 Okt Linz, Østrig, $600,000
You're probably right, the number of tournaments she'll be participating in will be dependent on how far she goes.