FS2Crew: PMDG 737 NGX “Reboot” entered beta testing recently, and is currently being tested by multiple real-world 737 pilots and FS enthusiasts.
ETA for release: Late June 2015.
This is not an upgrade for the old FS2Crew PMDG 737 NGX product. Rather, it is a brand new, completely redesigned product. It represents a major improvement over the old PMDG 737 NGX Version, which most of you all know.
For more information click here