In a recent leak, it was found that Facebook will again, most probably, merge its Messenger with the main app. However, this might not be true at all. The merging has been spotted by one Twitter user.
As per the app screenshots, the app will be completely white and black themed. Along with it, the Messenger will come inbuilt into the app as well.
The divide and rule policy of Facebook is going on with Facebook’s app since 2014 when both the apps were separated into two different apps. Now, it might be the first step of Zuckerberg’s single app for FB, Messenger, and WhatsApp.
However, this will not keep the essential feature for which the app is known for. You can only send and receive messages. It may be possible that Facebook leaves the Messenger app as a standalone, for those who want to use it.