Well, it didn't happen, did it. We are still here and so is Satan. Remember, not even Jesus knew that time when he'd come a 2nd time. And, he has not come again in His glory. He has appeared again to His Prophet Joseph Smith. But, that was just to open up this the last dispensation (or generation) before Armageddon. I think translators missed on this concept of generation versus dispensation. The Bible is correct as far as it is translated correctly. Historical fact shows there is a disconnect with the translation and what John actually meant. Translators mostly aren't with understanding about times of dispensations. John knew and most likely meant a time of dispensation.
Oh dear. Dispensation goes right back to Scofield and you're calling that a generation???? The Bible tells us again and again what a generation is