But what if the Jehovah's Witnesses are wrong? It could be worse...cows could be running the Universe!
Adam and Eve fell so that man could have a resurrection that would be far beyond their wildest dreams. As Paul stated, "Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him." (1 Cor. 2:9)
Of course being stuck in a static garden for trillions of years wouldn't be anyone's choice of how to spend the eternities. Had not Adam and Eve fallen, they would have lived forever and amounted to nothing. God not only knew they would fall, he was counting on it! That's the only way they could be "upgraded" to a resurrection that was far superior to anything Adam and Eve could have achieved living forever in a state of innocence. In fact, when Adam and Eve are resurrected, they will be like God in their glory and power.
One more thing, unless you happen to be visiting Jerusalem, you aren't going to be killed in Armageddon. Armageddon will occur when a Gentile prince invades the Holy Land, bent of the destruction of the Jews. He won't be interested in destroying Jerusalem; he wants to occupy the land but rid it once and forever of the Jews. And he'll nearly succeed. Only the return of Christ will stop the carnage.