You might be right, but I am of the opinion the 1949-50 tetrads are linked to the war with Israel's Muslim neighbors which broke out after Israel became a nation in 1948. That war ensued the following two years of 1949-50. It was formally ended in 1950. If this is correct, the tetrads of 2014-15 will most likely be linked to the next war with Israel which I think is the Psalm 83 War. I believe the Psalms 83 war triggers the covenant with many and the two-state solution.  I believe the signing of the covenant with many kicks off the 70th Week in the Fall of 2017.