mraimondi,
If I understand your questions, you're thinking of the old new light.
In '94, then 80 years after 1914, they changed it to "wicked generation" that was all contemporaneous wickedly living at the same time, whatever time. It was so obscure and ethereal as to be meaningless to our or any time period. Kind of like saying, "whenever it comes, that was THE generation".
So, the new new light, this year's flavor, involves not a "wicked generation", but is tied to "the faithful and discreet slave" as this generation. So, their new interpretation starts the generation with Jesus disciples who were listening to him (technically 33 CE, when holy spirit was poured out on "the anointed"). The generation spans about 2000 years to "the anointed 'faithful and discreet slave' class" today. Since the Bible says "this generation will not pass away", their interpretation is that their will still be some "anointed" JWs still alive when the Great Tribulation arrives.
Hows that for a complete stretch of the term "generation"... nearly 2000 years.
Of course, parts of Revelation, their interpretation, need to be revised accordingly.