Still, without a Dragon Break(recycling old material doesn't sound interesting), how would we get two canon endings?
I just watch the last battle with, the daedra prince that I don't actually remember the name of...anyway. Here is a thought
Martin has had past dealings with the Daedra and in that experience he had many meetings with Boethia(sp?). Also, knowing he was of royal descent, Martin understood the power that lie with his possession of the amulet of kings. He and Boethia conspired to tempt other said Deadra prince to the end that the line of emperors would be broken. From this story, things could have gotten out of hand and Martin could have died, and even this could have been according to boethia's plan, who did not want the chance for martin to become king again. Or Martin could have done whatever he did with the amulet just before, what looks like some sort of mysticism/teleportation, took him to safety where he and Boethia completed their deal and an age where the potential of political backstabbing would be ripe in the seize of the emperors old power.
Try using your own imaginations.
And on this note anyone who negatively criticizes someone else's work must be prepared to exchange it completely for their own, because otherwise you are talking directly from your ass.
Edit: @ seti18
That is unless you wanted 2 complete endings, and the only option for that would be the Dragon Break. And I agree that Dragon Break's cheapen the endings.
Edit: moved a comma. And to be clear there is personal anger in the post. And I'm sorry I had to take it out on this thread.