Alfresco has multiple cloud products, and each have their own roadmap. The Alfresco in the Cloud product at my.alfresco.com shares most of its code with on premise instances of Alfresco, and so the roadmap is very similar.
The roadmap in the wiki that Axel linked to is currently the official roadmap. Last time I updated the public roadmap, I did not call out specifically what is expected to be deployed in the Cloud. That is good feedback, and I can look at doing that in the future. As we prepare for the release of AlfrescoOne 5.1, I have been asked to update the roadmap for what comes next. If we have made a specific decision about whether a feature will be part of the cloud product, I will include that in the roadmap.
As Axel said, the most efficient way to get a specific question answered is to contact Alfresco Sales. I answer their questions every day, but I can only be in the forums a few times a month.