When they went to the 1995 change for "this generation," I thought it was huge and they didn't do such major adjustments so often. Well, I just happened to join the cult after the 1975 and Ray Franz debacles, so they were low key with changes. But 1995 ended that.
I have seen "the end isn't so near," "education with a purpose," "OMG, the end is very near," "overlapping generation," "the Governing Body are the only FDS," and money-grabbing changes along with other stuff so numerous, I tire of listing them.
The election of Obama, the real estate market drop of 2008, the fall of the Soviet Union, good news, bad news, hurricanes, etc. all indicated the end was close.
I don't doubt they will announce something that seems big. They do it all the time now.