S.h.i.e.l.d
S.H.I.E.L.D
World History
Schindler's List
Thanos
Very little information is gathered on Thanos. What we do know is that he could possibly be a serious threat in the future.
He is the one who let Loki use the Chitauri
The guardians have sent warnings of him
he is known to be a very powerful entity
We still don't know what are his intentions
" I will bathe the starways in your blood." - Thanos