Is there a hepa filter in the premium option? It is part of the premium upgrade in the S. If there isn't?, there must be a standard filter. No mention so far that I have seen.
I don't know if the Biohazard Defense mode will be available, or even if it is listed currently, but I would buy it no matter what if I could. Lot's of 'premium' options I don't care about in the slightest. But I absolutely would get whatever package delivered Biohazard Defense mode. It would be very nice to never smell someone else's tobacco smoke or diesel exhaust ever again while in traffic. Worth every penny.
Hasn't been mentioned in the released materials. Several are hoping for it.