Not long ago, Oracle released v12c of WebCenter Content Server. Officially, this was release 18.104.22.168.0 and was available to the public. Certainly, there were a few of you out there who carried the torch and installed this version to have an early look, and to "kick the tires," so to speak. Conservatively, the wise thing to do (and what Oracle encourages groups to do) was to wait for the initial patch for that new milestone release to be available.
Officially, 22.214.171.124.0 has been released (Download it HERE), and while it is considered a "gap release," there are a few new features introduced in this version. See the link below for a list of these features. Keep in mind though, this release was primarily scheduled to allow the Development group to catch up and fix many of the bugs and to "smooth out" some wrinkles that the initial version of 12c (126.96.36.199.0) introduced. Future OPatch releases for 188.8.131.52.0 are anticipated, and will be collected for your use in this KM Note.
If you're ready to upgrade, you can benefit from the experience of our Engineering staff by starting with this KM Note.
New features are listed here, in the product documentation.