Could mean, "You exiled me for my crimes...and now you will regret it, for I have returned!"
Could mean, "You thought I was gone, and you'd never have to deal with me again...but you were wrong, and now you will pay, for I have returned!"
Or it could mean "The Earth will tremble, for I have returned!! AND I AM KHAN NOONIAN SINGH!!"
Who knows. ('cept those lucky folks in Australia...)