Soon is a relative term in the wide aspect of life. When you look at the age of the earth in comparison to how long Automobiles, much less mustangs, have existed, it is nothing. Even moreso, you can compare the existance of life itself, not just man. We have existed in a time when 'soon' can be seen as the time to the end of life as we know it, as the earth and the universe has existed for many billions of years, whereas we have existed for merely a few thousand. The word 'soon' is much too broad of a word to use in the situation.
/intellectual.