Verizon is doing a beta testing through a "handful" of users of the 4.0.4 update on their LTE version of the phone. If they get alot of complaints about it, they won't do a massive OTA update to the rest of the GNex users on Verizon. Most likely, they won't receive alot of complaints and release it to rest of the public.
But, I think your situation is different because you are rooted and unlocked. I could be wrong, but I think you'll never get the OTA update because of this. You'll have to manually flash the update yourself, which works out nicely because you'll have the update much earlier than if you were to wait around for Verizon to send it to you. Of course, that's assuming you flash it sometime within the next couple of weeks, or months (who knows how long Verizon will take to send out 4.0.4).