Potential Carlsenogens

Who are the potential "Carlsenogens" who could defeat Carlsen within 20 years?

They would have to be pretty young at that point... say, under 20.

I'm under 20! 
In fact I'm turrrrning 3 in one month!
But I need to purrrractice... It's been too long and too much strrrress fur to play fur a while. 

Why would you call a Chinese guy Genghis Khan?

Any number of people could be a threat within 20 years, Welsey So, Richard Rapport, Samuel Sevian, Awonder LIang, Wang Hao, we have no idea.

Wei Yi

http://ratings.fide.com/card.phtml?event=8603405

Wei Yi can't be as good a prospect as this guy or he'd have an aura surrounding him, in a cosmic setting:

http://ratings.fide.com/card.phtml?event=24101605

If you're speaking of players who are currently at the top, I think the main candidates are Caruana, Aronian and Karjakin.

If you look at younger players, four names seems to me most likely : Giri, So, Rapport, and Wei Yi. 

and now I'll add the Alien Kid to the list (thanks Scottrf).

HI PANDA!

I rrremember meeting another Panda here, but he was Indian.

Hi! I have collected 14 Pandas in Pandas United. There's also one more Panda a Master from Germany.