User blog comment:Grey-summers19/A Little Confused/@comment-1895174-20140610185238

The Sentinel-infested, apocalyptic future is one timeline. The future where all that stuff never happened because the Sentinel project was shut down is another. The wiki treats alternate timelines as if they are alternate realities. Those characters who died in the apocalyptic future are still dead in that one, regardless of if they are still alive in the new universe.