You keep moving the goal posts. First it was finished at John. Then it was finished at the cross. Now it is to be finished by his saints? Is it finished yet??? Were there any prophecies left to fulfill after the cross??? How about this one from Amos 9:
"13Behold, the days come, saith the LORD, that the plowman shall overtake the reaper, and the treader of grapes him that soweth seed; and the mountains shall drop sweet wine, and all the hills shall melt. 14And I will bring again the captivity of my people of Israel, and they shall build the waste cities, and inhabit them; and they shall plant vineyards, and drink the wine thereof; they shall also make gardens, and eat the fruit of them. 15And I will plant them upon their land, and they shall no more be pulled up out of their land which I have given them, saith the LORD thy God."
Are you with Him in this or against Him???
And Christ fulfils the law and the prophets because He said so. Christ concealed in the OT; revealed in the NT. Works for me.
"Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil." -- Matthew 5:17