I strongly suspect that just three manufacturers will be able to submit PMTAs to FDA (that the agency will officially review) for some of their closed system vapor products within the next year, while the other 99.9% of vapor manufacturers will not be able to do so (a defacto ban on the sale of open system nicotine vapor products and bottles of e-liquid).
Those three companies are BAT/Reynolds (Vuse), Imperial/Fontem (blu) and Altria/JUUL (JUUL).
For political reasons (i.e. the so-called JUUL teen vaping epidemic), FDA will be far more likely to first approve PMTAs submitted for Vuse and blu (before JUUL). That is also likely why BAT/Reynolds and Imperial/Fontem did NOT seek to intervene in the AAP v FDA lawsuit (as they'll likely be the lawsuit's chief beneficiaries if/when their PMTAs are the first ones FDA approves for vapor products), and why JUUL and SFATA sought to intervene in the case.