The Disney Gallery has an announcement about the release of the Marie Osmond Disneyland Rose doll on July 15. (I expect it's a typo that the event supposedly starts at 10pm - I presume they mean 10am.) The price is $130 and some of the dolls will be presigned. Marie Osmond will be at the Carnation Garden Stage for a meet-and-greet but will not be signing additional dolls. Wristband distribution info is included in the link.
I also noticed last week that they have the doll on display in Disneyana for anyone who wants to see it in person beforehand.