Microsoft has announced Release Candidate 2 of SQL Server 2017, hot on the heels of RC1:
Microsoft is pleased to announce availability of SQL Server 2017 Release Candidate 2 (RC2), which is now available for download.
The release candidate represents an important milestone for SQL Server. Development of the new version of SQL Server along most dimensions needed to bring the industry-leading performance and security of SQL Server to Windows, Linux, and Docker containers is complete. We are continuing to work on performance and stress testing of SQL Server 2017 to get it ready for your most demanding Tier 1 workloads, as well as some final bug fixes.
There are no new features and the Windows release notes are empty, but there are some Linux release notes as they firm up that offering before launch.