My speculation comes from something that conspiracy theorists know as an Illuminati ritual called "Revelation of Method". It is when symbols and indications are given ahead of time, (revealed in movies, television shows, etc.) of something that is planned. This is how they coordinate their signals to each other in order to implement the agenda at each level.
Before I go into the WatchTower prediction and why, I would like to give you some examples of this "Revelation of Method" so you all can understand where it comes from.
This episode was a few years before the event.
http://www.youtube.com/watch?v=eJ7qtcCygc0&feature=related
The Awake magazine in 1975 had a depiction on the cover of the twin towers and an airborn jet in front of them. Could this be why all of the excitement of the "end of the world" back in 1975? Could some disaster have been planned and then postponed? Was WT in the know? (Not through any supernatural channels, mind you. Most likely through "other dark connections".) This particular issue was also discussed on a thread here awhile back.
Here is another example of Illuminati "Revelation of Method"
http://www.youtube.com/watch?v=hmgeA3dr2uY
How do I come up with April 5, 2011, and more importantly, why that particular date?
Why should April 5 be significant?
"The Death of Nadav and Avihu 1312 BCE
Nadav and Avihu, the sons of Aaron, took each of them his censer, and put fire in it, and put incense on it, and offered strange fire before G-d, which He commanded them not. A fire went out from G-d and consumed them and they died before G-d. (Leviticus 10: 1-2)"
http://www.chabad.org/calendar/view/day_cdo/aid/149883/jewish/Nissan-1.htm
According to the Jewish calendar this took place on April 5, 1312.
This story isn't really about using the wrong incense. "Strange fire" is a metaphor for the sin of willful presumption, teaching wrong concepts, and performing improperly in representing the Almighty and misleading people.
The day this alleged incident took place was on the day the temple was consecrated. And we all know that " When Jehovah cleans house he starts with the sanctuary!" It was a day of great triumph for the people and sudden tragedy for the liars.
What could be a more fitting date to foreshadow the demise of the WatchTower and her sister cults?
So, how do I come up with April 5?
Well, just like WatchTower's past predictions, it's simply a roll of the dice!