Poly, the argument that our times needs an evangelical booster shot from another incarnation is the slippery slope of the multi-incarnational theorem which claims ‘the Christ’ appeared to all those who needed to hear the gospel.
He appeared to neolithic humans and began communal human culture.
He appeared to Abraham as one of the three visitors.
He appeared as Rama and as the Budha and as Confucius.
He appeared to the pre-Columbian American Indians.
He appeared in 1917, only invisibly.
He appeared to dolpins as God-made-dolphin.
He’s appearing as this guy whom we’re all living with in a commune and slavishly obeying.
He appeared in every alien (extraterrestrial) world (as the incarnate form of each said alien species).
This all leads to Hinduistic avatars as incarnational theology, and as you rightly admit, it is heterodox (even if you believe it’s just one more time). Christianity insists on the uniqueness of the one time incarnation as once and for all, and on the uniqueness of his coming again in glory forever. Otherwise, the answer to the question, “Are you the one, or should we expect another?” is “Well, if you miss me now the first time, just hang around and I’ll be back, so go ahead, put off repentance till my next come back.”
Now, don’t get me wrong. I hold no animosity toward heretics.
And there will be many a heretic who loved well who will be entering the fullness of the king before so called orthodox believers who loved not well.
This teen of yours may very well be actualizing the inherent Christic potentialities that all humans have in an amazingly superior way. But be careful before thinking that he’s the one… again.
Peace.