Yes, I think it's possible that they will target inactive ones. But they won't use the word disfellowship. They will want to make it seem like it's all the doing of the inactive one. They will more likely say that such ones have disassociated themselves by virtue of their extended, willful inactivity. Maybe they'll institute a new policy that says an inactive one disassociates himself if he remains inactive for more than x years.
This will serve to plug the hole to leaving through fading. And they can say that they don't punish anyone for being inactive, nor do they force anyone to continue attending meetings and field service, but that they respect person's' right to choose to be inactive or to choose to disassociate by extended inactivity.
I think they will use it as a tactic to force fading JWs into returning. When the faded JW's time is coming close to the period where he will be classified as disassociated, the elders will call him and inform him that his non-attendance means his disassociation from the organization - along with all the negative implications - is imminent. They will ask him if this is what he wants or if he wants their help to be reactivated so that he can continue to have association with his JW family.