I haven't found it yet, but the WTS tends to say that some aspect of the prophecy was not fulfilled in the past indicating a greater or major fulfillment is yet in the future. Actually, the WTS says that every prophecy in the past has a major fulfillment in the Kingdom.
Here is an example:
*** w02 5/1 p. 22 Who Will Survive the Day of Jehovah? ***
This was in order to fulfill the prophecy at Malachi 4:5, where Jehovah stated: "Look! I am sending to you people Elijah the prophet before the coming of the great and fear-inspiring day of Jehovah." That prophecy had a first fulfillment in the work of John the Baptizer, who was foreshadowed by Elijah. John did an Elijahlike work when he baptized Jews who had repented of their sins against the Law covenant. More important, John was the Messiah?s forerunner. However, John?s work was only an initial fulfillment of Malachi?s prophecy. Jesus, while identifying John as a second Elijah, indicated that there would be a future "Elijah" work.?Matthew 17:11, 12.
Another point they use with regard to Matthew 24, etc. is that the "man of lawlessness" or great apostasy had not happened yet...according to the WTS.