Oxygen OS-CM 12S?

[cell2011]

Anyone going to be working on these as ports when they come out?

 

[Elluel]

Anyone going to be working on these as ports when they come out?

First of all, porting firmware from one device to another is extremely unlikely to function properly. If you can even get it to boot (the hardest part), a LOT will be broken as it was not built relevant to the hardware. Porting a custom ROM is even more pointless when it can be built specifically for your device.

OxygenOS has not been released yet, but it's likely to have features that other custom ROMs already have/can easily replicate.
Porting "CM12S" from the OnePlus One to the Nexus 5 is ultimately pointless. CM12 can be built from source anyways, then you can just take the few additional extra apk files from CM12S and paste them in.