Apple today has seeded an all-new round of betas to developers, including the second beta for iOS 9.3.3, OS X 10.11.6 El Capitan, and tvOS 9.2.2, and the first beta for watchOS 2.2.2 (although it's currently listed in the developer center as the second beta).
All of these updates have to deal with bug fixes (like their predecessors), so don't expect to see any front-facing features.
Users of the 9.7-inch iPad Pro have a pleasant surprise today. After finally being eligible for iOS 9.3.2 last week, they also have an iOS 9.3.3 beta 2 build available to them, unlike the original beta.
The release notes say virtually nothing. In fact, the watchOS 2.2.2 release notes currently throw an error, most likely because this is beta 1 and the dev center lists it as beta 2. tvOS 9.2.2 isn't showing anything either.
As for OS X 10.11.6 and iOS 9.3.3 beta 2, you guessed it. Just like every other minor beta in recent history, the OS X beta says exactly nothing about what's in it and the iOS beta shows issues with the Dictionary if you're upgrading to an iOS 9 GM seed and that iCloud Photo Library won't sync in the Simulator.