As you may already know, Microsoft has already started the development of the next feature update for Windows 10, namely "Redstone 2". It looks like Insiders can get the first "Redstone 2" build very soon, possibly even this week.
This information comes from Twitter user 'Core Insider Program':
Looks like you guys don't have that much time left to get the RS1 related badges. pic.twitter.com/QiBZWoAPdP
— Core Insider Program (@CoreInsiderProg) August 8, 2016
The source claims that Microsoft will roll out build 14901 to Insiders. It will be the first Redstone 2 build for the program. If so, you should not expect many new features or notable changes to the user interface in the upcoming build. Microsoft has released Windows 10 Anniversary Update just a few days ago, so Windows 10 build 14901 might not contain any end user facing new features at all.
This information about Windows 10 build 14901 has not been confirmed officially. Even if this rumor is true, keep in mind that this is a preview build, so Microsoft can quickly change their mind and decide to not release it this week (via Neowin).