Earlier today OnePlus released the kernel source for their controversial second handset, the OnePlus 2. In doing so they have opened the floodgates for ROM developers to start releasing custom ROM’s based on their own stock ROM as well other bases like AOSP & Cyanogenmod.
The first ROM to hit the XDA developers site is a CM 12.1 build by Grarak, although it is far from complete. Currently it will boot and the display, touchscreen and camera function but not much else. If you are the brave sort and fancy having a look (and with 64GB of storage, you have plenty space to back up your current ROM) you can download from the developers XDA thread thread.