Fennen was no longer part of this world. He had not managed to get his revenge, he had not managed to pay an eye for an eye to those who made him suffer, realistically he hadn't managed to do anything. The world did not stop even with Fennen dead. Fennen wasn't the main character, he was merely a cog in the world.
The world would keep spinning without him, as he was merely a tiny pawn in the eyes of the true behemoths of this world. People like him would come and go. Someone would rise to take his place, and they would fall just like he to make way for another. After all that is merely how the world works.
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Death is not preordained, it is sudden, and often completely unexpected. However this is not the last you will see of this world. More will come, and more will leave, and they shall show you both the horrors and wonders of this world.