In some theories something that is meant to be will always become. So if they come here before their death, but return right before, there is nothing that can be done. If they return after, perhaps another event will happen to claim them and bring balance.
Or, as I said, a split timeline. The people who knew them are from the timeline in which they died, but if they return home there is a new one in which they live. If you follow that sort of thinking there are infinite splits.
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Or, as I said, a split timeline. The people who knew them are from the timeline in which they died, but if they return home there is a new one in which they live. If you follow that sort of thinking there are infinite splits.