Yes the rumor mill has been kicking it out pretty good for Google and VR but it is a NO-BRAINIER to say that they will announce something new for the Mobile VR market and some sort of a ecosystem to tie that in to their existing VR/360 ventures.
Including a update to Chrome for faster rendering in VR @ 90fps.
But expect the plans to be laid out for consumers at the Google I/O conference that runs May 18, 19, 20th 2016.
Most anything they will want you to know in the next 6-8 months will be released then.
Look for something new for VR in the form of a ChromeBookVR.
I have to say that Googles approach from the bottom up is likely to gain the best traction in the longer term depending on how many other players join them. But they have the muscle to make a very powerful ecosystem and gives them many advantages.