Ruin Explorer
Legend
And, to be honest, I am not convinced that WotC should try to fight that trend. Current players probably do a better job of selling the game and making it fun for new people than any WotC marketing could.
The problem with this attitude is that it seems to be intentionally ignoring the fact that, at some point, people were picking up D&D and getting into it without being taught by others. Largely in the 1980s, it seems. It seems like with was down to boxed-set-type D&D, too.
It's good for WotC to support their players in reaching new players (hey, even I do it), but unless they genuinely try to reach some people who've not played before, well, I don't think that the rate of new player induction will outstrip player loss, put it like that.