There's really only one, possibly two saviors of Java. Redhat with JBoss/Icedtea, and OpenJDK, which has IBM, Redhat, Oracle and Doug Lea at the top level. I don't see any great examples of building successful open source communities from IBM, but open sourcing OpenJ9 earns them some good will. Short of OpenJDK being adopted by Apache/Mozilla/etc.. (Oracle will let this happen after hell freezes over..) Java really has only one savior.
Redhat is skipping the minor Java versions, so it's Icedtea/OpenJDK build has Java 8, and the next version will have Java 11. This is what I'll be using on Linux.