From what The Inquirer has been able to find out, the Microsoft event taking place next month will not herald the release of the Surface Book 2, Surface Pro 5 nor the Surface Phone. 
It is quite likely we will see a new low cost Surface 3 device announced as well as more information on Project Scorpio.  This should also offer the first details on the new OS that Microsoft has been working on to challenge ChromeOS in low cost devices.  Windows 10 Cloud, also known as Bespin, will be a low cost OS which runs Windows Universal apps and will be aimed at students and those who want small inexpensive devices for light computing usage.  Check out more details here.

"Microsoft sent out cryptic invites on Wednesday (we're still waiting for ours) which suggests there will be an education focus at the event, with the invite sporting 'Learn what's next' caption and '#MicrosoftEdu' hashtag."

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