One of the main colors of EclEmma contribution to Oxygen release train - is to bring Eclipse code coverage plugin for Java available by default in "Eclipse IDE for Java Developers" (
https://projects.eclipse.org/projects/technology.eclemma/releases/3.0.0/plan ). We think that there is good progress towards this goal. Also AFAIK one of the main colors for Oxygen release - is Java 9 support. So will be great if EclEmma can come with Java 9 support too at a day zero, however this depends on JaCoCo coverage library (developed by us outside of Eclipse foundation).
We are closely following development of OpenJDK 9 and test JaCoCo with early access builds. We already made some changes for compatibility ( e.g.
https://github.com/jacoco/jacoco/pull/434 ) and recently released JaCoCo 0.7.9 with Java 9 support that has been tested with latest JDK 9 EA b156, passed CQ for it and added it into the Eclipse Orbit. So kind of in a safe situation for now in terms of deadline, hoping that no other changes will be required on JaCoCo side anymore, but can't guarantee this till very last tests.