I am afraid that is a question for Adobe themselves. No one here will be able to answer that. All I can offer is that you make your view known to them by submitting a feature request. The more that do, the greater chance there is that it will eventually happen.
FM is already part of the TechComm Suite "Cloud" product (i.e. subscription basis product) and probably will never be part of the "Creative" cloud.
For more details, follow the links here: http://www.adobe.com/ca/products/technicalcommunicationsuite/upgrade.displayTab3.html
Ah yes, that curious Adobe assumption that people who merely write shouldn't be counted as Creative …