The lifespan of an MMO depends on its players and its content. And those are two things that should not be seen separately.
Because, as long as compelling content keeps coming, chances are the players will stick around. That is why The Elder Scrolls: Online continues to receive new expansions on a regular basis. The newest of these is High Isle and has now arrived, accompanied by a launch trailer. We don’t see much of the environment in it, but we do see an epic confrontation.