For a few weeks, BPM 12cR2 is released, next to SOA 12cR2. But if you go to the download area of BPM on OTN, you'll find that the downloads suggest Release 12c (12.1.3.0.0).
Just now on community.oracle.com, I found an answer to the question I had quitely my self for a few weeks: where to download BPM12cR2?
I didn't check-out edelivery.oracle.com my self yet, but you can go to Oracle BPM Suite Downloads | Oracle Technology Network | Oracle. Then accept the download agreements on the page, as though you were to download the links on the page. Then use the following links to download part one and two of the BPM QuickStart installer:
Thanks mr. Atwood. Hopefully Oracle repairs the links soon.