I genuinely don't understand what you mean. If there's no VR support For Odyssey at launch then there wont be any VR for Odyssey at launch.They said no VR support For Odessey at launch.
You could be right, but it doesn't really make sense that they would have to scrap VR for anyone who downloads the expansion.
(While noting Arf will let us know specifics when he can)
edit - Base and Horizons will keep VR though