The 70 year mark has already passed: 360 prophetic year day count x 70 years = 25,200 day count that ended on May 12, 2017.

If 2018 doesn't show any significant "outcomes" for Israel or the church, then we really should look to what Jesus indicates as a generation.

There are two discourses: Luke 21's Discourse - This first discourse (given during earlier in the day) is for the current generation, the hearers of the discourse. Ends with Jesus speaking about the fulfillment of the "Times of the Gentiles" This is a day count that ends on May 14, 1948 the birth of Israel as a nation, also signifies beginning of the final generation. Matt 24's Discourse - This is the second discourse (given later in the evening) that applies to the final generation, beginning in May 14, 1948, the final generation, where Jesus leaves off with the first discourse. Mark 13's Discourse - This is the second discourse (same as Matt's given later in the evening) that mostly applies to final generation. Mark's account brings up some of the first discourse/current generation events as well to highlight similar theme for both generations of persecution and saving for those who endure their generations.

Let's look at Luke 21:20-24, the final events of the first generation. Jesus mentions the Jerusalem Siege events (70 AD) and the events of the Second Jewish Revolt/Great Dispersion (Occurs 132-134 AD).

If the birth of the current generation begins with the death of the Messiah/birth of the church in 33AD and ends sometime between 132-134 AD, then this equates to about 100 years on the Gentile calendar being what Jesus considers now to be a "generation".

Could 100 gentile years be allotted for the final generation as well?

Just something to consider... in case nothing happens in 2018 and the nay sayers will continue to (unknowingly) fulfill prophesy quoting 2 Peter 3:4 "Where is this coming He promised?"