L doesn't die.
Light thought L could prove useful to him, so he didn't kill him.
but when L and light get an contact from Cain (I had to use my name... I'd bee more fun!)
who is like an L in America, that his statistics show that there is a 96% chance of Kira being in America, L is forced to move, and Light and Misa follow him to investigate for the CIA. I think Misa should get killed by a band of terrorists that think she is Kira, and they end up being killed by that new holder of the death note, (Whose name i forgot) and Light will eventualy team up with Noir, as a contact for Japan, and other people who work in other countries until they form a Group called Kira instagators agency, also known as the K.I.A. The U.N. will fund their efforts, and light will eventualy kill L again, and will gain the trust of the other K.I.A. Members to get their names, and kill them as well. At the end Cain will come in a final face-off with Light, for he has a notebook too. They kill each other using the Gods of death, and no one ever found out about what happened until someoe else found the note book... THE PRESIDENT OF THE UNITED STATES! or the secratary of state... either way, someone important.