First, I wouldn’t be so quick to boldly proclaim anything pertaining to prophecy with just two scriptures to back you. We must keep them in context.
Second, why couldn’t the prophecies be fulfilled until now? The last days began in NT times.
Third, Daniel’s interpretation of Nebuchadnezzar’s image in Dan 2 reveals that the Roman Empire (legs of iron) was to rise after the Grecian empire. The Roman Empire was in existence in John’s day, thus negating your two-scriptured yardstick.