Considering a Ronin 2 for interior driving shots as a remote head but the fooatge Im seeing, due to stabilization, makes it look as if it's shot on a green screen (the world outside is solid while the car moves around the cam). Is there a way to lock the roll or has anyone had any luck with this?

The closest you can have is the Pan Lock Mode. Here is some information on that point:

Pan lock mode only locks pan, not roll.

If you want the camera to move with the car, you should shoot on a hi hat in the car or on a hostess tray mounted tot the car.

You cannot turn off stabilization on roll or tilt axis.

Noadventure Posted at 2018-4-22 02:50
Pan lock mode only locks pan, not roll.

If you want the camera to move with the car, you should shoot on a hi hat in the car or on a hostess tray mounted tot the car.

I actually just heard back from DJI and they told me they are working on a software patch to do just that after I explained why. A hostess tray and hi hat are great if you don't need to operate but this was for an operated shot. Stay tuned.