Everyone has an opinion on this, and really any opinion is valid right now, but the FDA has already approved a tobacco & a menthol flavor. Yes, it is a Vuse, but it is also a precedent. I think the FDA will have a hard time justifying not allowing other tobacco and menthol flavors from other companies. So, if you believe that logic that I just laid out, you should be able to buy tobacco & menthol flavor juices both at a B&M and online. All the other flavors are probably gone, or will be gone. Vuse tried to get their berry flavor approved and I think the FDA rejected that one. Again, just my opinion, but I think you will be able to get juice, you may just not like the flavor. And one last time, in my opinion.
Vuze got approved because of their "smart" cartridge technology which does not allow hacking of the cartridge to refill it or counterfeit cartridges, kinda in the same way that printer cartridges work. And, as you said, only tobacco and menthol.